Recorder is a musical instrument. It starts with r and ends with er.
Zoner
Cluster :)
baker
Tidier
Some words beginning with B and ending with ER:BabblerBackerBadderBadgerBafflerBaggierBakerBalderBalerBalkierBalmierBankerBannerBarberBarerBarkerBarrierBarterBaserBasterBatterBattierBattlerBawdierBeadierBeakerBearerBeaterBeaverBeefierBeeperBeerBickerBidderBierBiggerBikerBinderBiterBitterBittierBlabberBlackerBladderBlanderBlasterBleakerBleederBlenderBlinderBlinkerBlisterBlitherBloaterBlockerBlonderBloomerBlooperBlotterBlubberBluerBlufferBlunderBlunterBlusherBoarderBoasterBolsterBonerBonierBoogerBoosterBoozierBorderBorerBotcherBotherBottlerBoulderBouncerBounderBowerBowlerBoxerBraggerBranderBraverBrawlerBrazierBreederBrewerBriberBrieferBrierBroaderBroilerBrokerBrooderBrotherBrownerBrowserBruiserBucklerBufferBuggerBuggierBuilderBulgierBulkierBumblerBummerBumperBumpierBunglerBunkerBurgerBurlierBurnerBushierBusierBustierButcherButlerButterBuyerBuzzer
Eritrea starts with ER. It is a country in East Africa.
the answer is 'stranger'.
Some verbs that end in -er are:alterbuffercheerdifferleermurderofferrefersteersuffer
jupiter
erase
brother
photographerstenographer