diff --git a/sqlalchemy-stubs/orm/__init__.pyi b/sqlalchemy-stubs/orm/__init__.pyi
index bc5a75e..0b64bbb 100644
--- a/sqlalchemy-stubs/orm/__init__.pyi
+++ b/sqlalchemy-stubs/orm/__init__.pyi
@@ -1,7 +1,15 @@
+from typing import AbstractSet
 from typing import Any
+from typing import Callable
+from typing import Literal
 from typing import Mapping
+from typing import MutableMapping
 from typing import Optional
+from typing import overload
+from typing import Sequence
 from typing import Tuple
+from typing import Type
+from typing import Union
 
 from . import exc as exc
 from . import mapper as mapperlib  # noqa
@@ -46,6 +54,7 @@ from .properties import ColumnProperty as ColumnProperty
 from .query import AliasOption as AliasOption
 from .query import FromStatement as FromStatement
 from .query import Query as Query
+from .relationships import _OrderByArgument
 from .relationships import foreign as foreign
 from .relationships import RelationshipProperty as RelationshipProperty
 from .relationships import remote as remote
@@ -73,27 +82,148 @@ from .util import polymorphic_union as polymorphic_union
 from .util import was_deleted as was_deleted
 from .util import with_parent as with_parent
 from .util import with_polymorphic as with_polymorphic
+from ..sql import schema
+from ..sql.schema import _ServerDefaultType
+from ..sql.schema import FetchedValue
+from ..sql.schema import SchemaEventTarget
 
 def create_session(bind: Optional[Any] = ..., **kwargs: Any) -> Session: ...
 
 with_loader_criteria = LoaderCriteriaOption
-relationship = RelationshipProperty
-
-def relation(*arg: Any, **kw: Any) -> RelationshipProperty[Any]: ...
-def dynamic_loader(argument: Any, **kw: Any) -> RelationshipProperty[Any]: ...
-
-column_property = ColumnProperty
-composite = CompositeProperty
 
 _BackrefResult = Tuple[str, Mapping[str, Any]]
 
+def relationship(
+    argument: Any,
+    secondary: Optional[Any] = ...,
+    primaryjoin: Optional[Any] = ...,
+    secondaryjoin: Optional[Any] = ...,
+    foreign_keys: Optional[Any] = ...,
+    uselist: Optional[bool] = ...,
+    order_by: _OrderByArgument = ...,
+    backref: Union[str, _BackrefResult] = ...,
+    back_populates: str = ...,
+    overlaps: Union[AbstractSet[str], str] = ...,
+    post_update: bool = ...,
+    cascade: Union[Literal[False], Sequence[str]] = ...,
+    viewonly: bool = ...,
+    lazy: str = ...,
+    collection_class: Optional[Union[Type[Any], Callable[[], Any]]] = ...,
+    passive_deletes: Union[bool, Literal["all"]] = ...,
+    passive_updates: bool = ...,
+    remote_side: Optional[Any] = ...,
+    enable_typechecks: bool = ...,  # NOTE: not documented
+    join_depth: Optional[int] = ...,
+    comparator_factory: Optional[Any] = ...,
+    single_parent: bool = ...,
+    innerjoin: Union[bool, str] = ...,
+    distinct_target_key: Optional[bool] = ...,
+    doc: Optional[str] = ...,
+    active_history: bool = ...,
+    cascade_backrefs: bool = ...,
+    load_on_pending: bool = ...,
+    bake_queries: bool = ...,
+    _local_remote_pairs: Optional[Any] = ...,
+    query_class: Optional[Any] = ...,
+    info: Optional[MutableMapping[Any, Any]] = ...,
+    omit_join: Optional[Literal[False]] = ...,
+    sync_backref: Optional[Any] = ...,
+) -> Any: ...
+def relation(*arg: Any, **kw: Any) -> Any: ...
+def dynamic_loader(argument: Any, **kw: Any) -> Any: ...
+def column_property(*arg: Any, **kw: Any) -> Any: ...
+def composite(*arg: Any, **kw: Any) -> Any: ...
+@overload
+def mapped_column(
+    __name: str,
+    *args: SchemaEventTarget,
+    autoincrement: Union[bool, Literal["auto", "ignore_fk"]] = ...,
+    default: Optional[Any] = ...,
+    doc: Optional[str] = ...,
+    key: Optional[str] = ...,
+    index: Optional[bool] = ...,
+    info: MutableMapping[Any, Any] = ...,
+    nullable: bool = ...,
+    onupdate: Optional[Any] = ...,
+    primary_key: bool = ...,
+    server_default: Optional[_ServerDefaultType[Any]] = ...,
+    server_onupdate: Optional[FetchedValue] = ...,
+    quote: Optional[bool] = ...,
+    unique: Optional[bool] = ...,
+    system: bool = ...,
+    comment: Optional[str] = ...,
+    **kwargs: Any,
+) -> Any: ...
+@overload
+def mapped_column(
+    *args: SchemaEventTarget,
+    autoincrement: Union[bool, Literal["auto", "ignore_fk"]] = ...,
+    default: Optional[Any] = ...,
+    doc: Optional[str] = ...,
+    key: Optional[str] = ...,
+    index: Optional[bool] = ...,
+    info: MutableMapping[Any, Any] = ...,
+    nullable: bool = ...,
+    onupdate: Optional[Any] = ...,
+    primary_key: bool = ...,
+    server_default: Optional[_ServerDefaultType[Any]] = ...,
+    server_onupdate: Optional[FetchedValue] = ...,
+    quote: Optional[bool] = ...,
+    unique: Optional[bool] = ...,
+    system: bool = ...,
+    comment: Optional[str] = ...,
+    **kwargs: Any,
+) -> Any: ...
+@overload
+def mapped_column(
+    __name: str,
+    __type: Union[schema._TE, Type[schema._TE]],
+    *args: SchemaEventTarget,
+    autoincrement: Union[bool, Literal["auto", "ignore_fk"]] = ...,
+    default: Optional[Any] = ...,
+    doc: Optional[str] = ...,
+    key: Optional[str] = ...,
+    index: Optional[bool] = ...,
+    info: MutableMapping[Any, Any] = ...,
+    nullable: bool = ...,
+    onupdate: Optional[Any] = ...,
+    primary_key: bool = ...,
+    server_default: Optional[_ServerDefaultType[schema._TE]] = ...,
+    server_onupdate: Optional[FetchedValue] = ...,
+    quote: Optional[bool] = ...,
+    unique: Optional[bool] = ...,
+    system: bool = ...,
+    comment: Optional[str] = ...,
+    **kwargs: Any,
+) -> Any: ...
+@overload
+def mapped_column(
+    __type: Union[schema._TE, Type[schema._TE]],
+    *args: SchemaEventTarget,
+    autoincrement: Union[bool, Literal["auto", "ignore_fk"]] = ...,
+    default: Optional[Any] = ...,
+    doc: Optional[str] = ...,
+    key: Optional[str] = ...,
+    index: Optional[bool] = ...,
+    info: MutableMapping[Any, Any] = ...,
+    nullable: bool = ...,
+    onupdate: Optional[Any] = ...,
+    primary_key: bool = ...,
+    server_default: Optional[_ServerDefaultType[schema._TE]] = ...,
+    server_onupdate: Optional[FetchedValue] = ...,
+    quote: Optional[bool] = ...,
+    unique: Optional[bool] = ...,
+    system: bool = ...,
+    comment: Optional[str] = ...,
+    **kwargs: Any,
+) -> Any: ...
 def backref(name: str, **kwargs: Any) -> _BackrefResult: ...
-def deferred(*columns: Any, **kw: Any) -> ColumnProperty: ...
-def query_expression(default_expr: Any = ...) -> ColumnProperty: ...
+def deferred(*columns: Any, **kw: Any) -> Any: ...
+def query_expression(default_expr: Any = ...) -> Any: ...
 
 mapper = Mapper
-synonym = SynonymProperty
 
+def synonym(*arg, **kw) -> Any: ...
 def clear_mappers() -> None: ...
 
 joinedload = strategy_options.joinedload._unbound_fn
diff --git a/sqlalchemy-stubs/sql/schema.pyi b/sqlalchemy-stubs/sql/schema.pyi
index 244dd8f..923e283 100644
--- a/sqlalchemy-stubs/sql/schema.pyi
+++ b/sqlalchemy-stubs/sql/schema.pyi
@@ -56,6 +56,8 @@ _ID = TypeVar("_ID", bound=Identity)
 
 _ServerDefaultType = Union[FetchedValue, str, TextClause, ColumnElement[_T]]
 
+_T = TypeVar("_T", bound=type_api.TypeEngine)
+
 class SchemaItem(SchemaEventTarget, visitors.Visitable):
     __visit_name__: str = ...
     create_drop_stringify_dialect: str = ...