diff --git a/js/common/FMWDerivedStrings.ts b/js/common/FMWDerivedStrings.ts
index 3efa084e..df772f5f 100644
--- a/js/common/FMWDerivedStrings.ts
+++ b/js/common/FMWDerivedStrings.ts
@@ -43,23 +43,23 @@ const FMWDerivedStrings = {
     tandem: DERIVED_STRINGS_TANDEM.createTandem( 'xMillisecondsStringProperty' )
   } ),
 
-  spaceXStringProperty: new PatternStringProperty( FourierMakingWavesStrings.spaceSymbolStringProperty, {
+  functionOfSpaceStringProperty: new PatternStringProperty( FourierMakingWavesStrings.spaceSymbolStringProperty, {
     symbol: FMWSymbols.xMarkupStringProperty
   }, {
-    tandem: DERIVED_STRINGS_TANDEM.createTandem( 'spaceXStringProperty' )
+    tandem: DERIVED_STRINGS_TANDEM.createTandem( 'functionOfSpaceStringProperty' )
   } ),
 
-  timeTStringProperty: new PatternStringProperty( FourierMakingWavesStrings.timeSymbolStringProperty, {
+  functionOfTimeStringProperty: new PatternStringProperty( FourierMakingWavesStrings.timeSymbolStringProperty, {
     symbol: FMWSymbols.tMarkupStringProperty
   }, {
-    tandem: DERIVED_STRINGS_TANDEM.createTandem( 'timeTStringProperty' )
+    tandem: DERIVED_STRINGS_TANDEM.createTandem( 'functionOfTimeStringProperty' )
   } ),
 
-  spaceAndTimeXTStringProperty: new PatternStringProperty( FourierMakingWavesStrings.spaceAndTimeSymbolsStringProperty, {
+  functionOfSpaceAndTimeStringProperty: new PatternStringProperty( FourierMakingWavesStrings.spaceAndTimeSymbolsStringProperty, {
     spaceSymbol: FMWSymbols.xMarkupStringProperty,
     timeSymbol: FMWSymbols.tMarkupStringProperty
   }, {
-    tandem: DERIVED_STRINGS_TANDEM.createTandem( 'spaceAndTimeXTStringProperty' )
+    tandem: DERIVED_STRINGS_TANDEM.createTandem( 'functionOfSpaceAndTimeStringProperty' )
   } ),
 
   lambdaAndTStringProperty: new PatternStringProperty( FourierMakingWavesStrings.symbolAndSymbolStringProperty, {
diff --git a/js/common/view/DomainComboBox.ts b/js/common/view/DomainComboBox.ts
index cf7d358a..4243f9e2 100644
--- a/js/common/view/DomainComboBox.ts
+++ b/js/common/view/DomainComboBox.ts
@@ -20,17 +20,17 @@ import FMWDerivedStrings from '../FMWDerivedStrings.js';
 const CHOICES: FMWComboBoxChoice<Domain>[] = [
   {
     value: Domain.SPACE,
-    stringProperty: FMWDerivedStrings.spaceXStringProperty,
+    stringProperty: FMWDerivedStrings.functionOfSpaceStringProperty,
     tandemName: `space${ComboBox.ITEM_TANDEM_NAME_SUFFIX}`
   },
   {
     value: Domain.TIME,
-    stringProperty: FMWDerivedStrings.timeTStringProperty,
+    stringProperty: FMWDerivedStrings.functionOfTimeStringProperty,
     tandemName: `time${ComboBox.ITEM_TANDEM_NAME_SUFFIX}`
   },
   {
     value: Domain.SPACE_AND_TIME,
-    stringProperty: FMWDerivedStrings.spaceAndTimeXTStringProperty,
+    stringProperty: FMWDerivedStrings.functionOfSpaceAndTimeStringProperty,
     tandemName: `spaceAndTime${ComboBox.ITEM_TANDEM_NAME_SUFFIX}`
   }
 ];