diff --git a/packages/react-reconciler/src/ReactFiberPendingPriority.js b/packages/react-reconciler/src/ReactFiberPendingPriority.js
index 860aa0e44256eb..a79837f79b5bfe 100644
--- a/packages/react-reconciler/src/ReactFiberPendingPriority.js
+++ b/packages/react-reconciler/src/ReactFiberPendingPriority.js
@@ -16,7 +16,7 @@ import {enableSuspense} from 'shared/ReactFeatureFlags';
 
 // TODO: Offscreen updates
 
-export function addPendingWork(
+export function addPendingPriorityLevel(
   root: FiberRoot,
   expirationTime: ExpirationTime,
 ): void {
@@ -41,7 +41,7 @@ export function addPendingWork(
   }
 }
 
-export function flushPendingWork(
+export function flushPendingPriorityLevel(
   root: FiberRoot,
   currentTime: ExpirationTime,
   earliestRemainingTime: ExpirationTime,
@@ -81,7 +81,7 @@ export function flushPendingWork(
     if (earliestSuspendedTime === NoWork) {
       // There's no suspended work. Treat the earliest remaining level as a
       // pending level.
-      addPendingWork(root, earliestRemainingTime);
+      addPendingPriorityLevel(root, earliestRemainingTime);
       return;
     }
 
@@ -95,14 +95,14 @@ export function flushPendingWork(
 
       // There's no suspended work. Treat the earliest remaining level as a
       // pending level.
-      addPendingWork(root, earliestRemainingTime);
+      addPendingPriorityLevel(root, earliestRemainingTime);
       return;
     }
 
     if (earliestRemainingTime < earliestSuspendedTime) {
       // The earliest remaining time is earlier than all the suspended work.
       // Treat it as a pending update.
-      addPendingWork(root, earliestRemainingTime);
+      addPendingPriorityLevel(root, earliestRemainingTime);
       return;
     }
 
@@ -111,7 +111,7 @@ export function flushPendingWork(
   }
 }
 
-export function suspendPendingWork(
+export function suspendPriorityLevel(
   root: FiberRoot,
   suspendedTime: ExpirationTime,
 ): void {
@@ -157,7 +157,7 @@ export function suspendPendingWork(
   }
 }
 
-export function resumePendingWork(
+export function resumePriorityLevel(
   root: FiberRoot,
   pingedTime: ExpirationTime,
 ): void {
@@ -187,9 +187,7 @@ export function resumePendingWork(
   }
 }
 
-export function findNextExpirationTimeToWorkOn(
-  root: FiberRoot,
-): ExpirationTime {
+export function findNextPendingPriorityLevel(root: FiberRoot): ExpirationTime {
   if (enableSuspense) {
     const earliestSuspendedTime = root.earliestSuspendedTime;
     const earliestPendingTime = root.earliestPendingTime;
diff --git a/packages/react-reconciler/src/ReactFiberScheduler.js b/packages/react-reconciler/src/ReactFiberScheduler.js
index 5cde1a7c88307a..23481e670132db 100644
--- a/packages/react-reconciler/src/ReactFiberScheduler.js
+++ b/packages/react-reconciler/src/ReactFiberScheduler.js
@@ -58,11 +58,11 @@ import ReactFiberHydrationContext from './ReactFiberHydrationContext';
 import ReactFiberInstrumentation from './ReactFiberInstrumentation';
 import ReactDebugCurrentFiber from './ReactDebugCurrentFiber';
 import {
-  addPendingWork,
-  flushPendingWork,
-  findNextExpirationTimeToWorkOn,
-  suspendPendingWork,
-  resumePendingWork,
+  addPendingPriorityLevel,
+  flushPendingPriorityLevel,
+  findNextPendingPriorityLevel,
+  suspendPriorityLevel,
+  resumePriorityLevel,
 } from './ReactFiberPendingPriority';
 import {
   recordEffect,
@@ -260,7 +260,7 @@ export default function<T, P, I, TI, HI, PI, C, CC, CX, PL>(
   let nextRoot: FiberRoot | null = null;
   // The time at which we're currently rendering work.
   let nextRenderExpirationTime: ExpirationTime = NoWork;
-  let nextEarliestTimeoutMs: number = -1;
+  let nextLatestTimeoutMs: number = -1;
   let nextRenderIsExpired: boolean = false;
 
   // The next fiber with an effect that we're currently committing.
@@ -358,7 +358,7 @@ export default function<T, P, I, TI, HI, PI, C, CC, CX, PL>(
 
     nextRoot = null;
     nextRenderExpirationTime = NoWork;
-    nextEarliestTimeoutMs = -1;
+    nextLatestTimeoutMs = -1;
     nextRenderIsExpired = false;
     nextUnitOfWork = null;
 
@@ -684,8 +684,8 @@ export default function<T, P, I, TI, HI, PI, C, CC, CX, PL>(
       ReactFiberInstrumentation.debugTool.onCommitWork(finishedWork);
     }
 
-    flushPendingWork(root, currentTime, root.current.expirationTime);
-    const remainingTime = findNextExpirationTimeToWorkOn(root);
+    flushPendingPriorityLevel(root, currentTime, root.current.expirationTime);
+    const remainingTime = findNextPendingPriorityLevel(root);
     if (remainingTime === NoWork) {
       // If there's no remaining work, we can clear the set of already failed
       // error boundaries.
@@ -970,7 +970,7 @@ export default function<T, P, I, TI, HI, PI, C, CC, CX, PL>(
       resetStack();
       nextRoot = root;
       nextRenderExpirationTime = expirationTime;
-      nextEarliestTimeoutMs = -1;
+      nextLatestTimeoutMs = -1;
       nextUnitOfWork = createWorkInProgress(
         nextRoot.current,
         null,
@@ -1067,15 +1067,13 @@ export default function<T, P, I, TI, HI, PI, C, CC, CX, PL>(
           'Expired work should have completed. This error is likely caused ' +
             'by a bug in React. Please file an issue.',
         );
-        suspendPendingWork(root, expirationTime);
-        if (nextEarliestTimeoutMs >= 0) {
+        suspendPriorityLevel(root, expirationTime);
+        if (nextLatestTimeoutMs >= 0) {
           setTimeout(() => {
             retrySuspendedRoot(root, expirationTime);
-          }, nextEarliestTimeoutMs);
+          }, nextLatestTimeoutMs);
         }
-        const firstUnblockedExpirationTime = findNextExpirationTimeToWorkOn(
-          root,
-        );
+        const firstUnblockedExpirationTime = findNextPendingPriorityLevel(root);
         onBlock(firstUnblockedExpirationTime);
         return null;
       }
@@ -1254,17 +1252,14 @@ export default function<T, P, I, TI, HI, PI, C, CC, CX, PL>(
     suspendedTime: ExpirationTime,
   ) {
     // Schedule the timeout.
-    if (
-      timeoutMs >= 0 &&
-      (nextEarliestTimeoutMs === -1 || timeoutMs < nextEarliestTimeoutMs)
-    ) {
-      nextEarliestTimeoutMs = timeoutMs;
+    if (timeoutMs >= 0 && nextLatestTimeoutMs < timeoutMs) {
+      nextLatestTimeoutMs = timeoutMs;
     }
   }
 
   function retrySuspendedRoot(root, suspendedTime) {
-    resumePendingWork(root, suspendedTime);
-    const retryTime = findNextExpirationTimeToWorkOn(root);
+    resumePriorityLevel(root, suspendedTime);
+    const retryTime = findNextPendingPriorityLevel(root);
     if (retryTime !== NoWork) {
       requestRetry(root, retryTime);
     }
@@ -1310,10 +1305,8 @@ export default function<T, P, I, TI, HI, PI, C, CC, CX, PL>(
             interruptedBy = fiber;
             resetStack();
           }
-          addPendingWork(root, expirationTime);
-          const nextExpirationTimeToWorkOn = findNextExpirationTimeToWorkOn(
-            root,
-          );
+          addPendingPriorityLevel(root, expirationTime);
+          const nextExpirationTimeToWorkOn = findNextPendingPriorityLevel(root);
           if (
             // If we're in the render phase, we don't need to schedule this root
             // for an update, because we'll do it before we exit...