Airplane, ashtray and airport are compound nouns. They begin with the letter a.
Some nouns starting with the letter A:aardvarkabilityactorAdamaerosolaffairagateairalarmAmericaanchorapple
In general, compounds are not capitalized in writing unless they are proper nouns or the first word in a sentence.
Yes, it is a biological compound. Elements and compounds are nouns.
compounds
Some nouns that include the letter X are:anxietyaxaxiomboxexitfoxx-rayxantusxenophobiaxenopsXeroxxylophone
Common nouns that start with the letter T include:tabtablettapetaxteateetelevisiontracertracktrackertriangletricktrickstertriketrinkettripletstubtubatuna
Common nouns that start with the letter y:yardstickyarnyearbookyo-yoyogurt
Nouns that start with letter D:dabdaddydaisydalmatiandamaskdangerdatedealdeandeardeathdecorationdeerdementiademocracydemolitiondenimdevotiondialdiameterdiaperdictatordignitydiligencedilldimpledindinerdingodinnerdinosaurdiphtheriadipperdirectiondisasterdisgustdishdistanceditchdivadoctordoctrinedocumentdogdogmadolldolphindomaindonkeydoordoughnutdovedraindragondragonflydramadreaddressdrinkdromedarydropdroughtduckdueldumplingdungeondumpsterdutydwellingdynasty
Examples of four letter nouns:acrebarncarddeckedgefroggoatholeironjokekneeluckmeatnoteokrapailquizrosestartownuservasewaspx-rayyearzeal
Two common nouns that begin with letter J are:jewelryjury
Some nouns that end with the letter Y:abbeyalleyallybabybaybeautybellyBobbybootyboyBritneycertaintycrycubbydairydaisydaydonkeyEmilyeternityfairyFebruaryfollygalleygravygreygullyguppyheredityhighwayhospitalityironyItalyivoryivyjellyjerseyJulyjuryKellyKentuckyladylilyMay DaymelancholymoneynationalitynavyorgyospreypartypityquayqueryrallyrayrubysanitysavvysoystorytallytheorytoytrayUruguayusuryvalleyvarietyvictoryvolleywallabywayWednesdaywheyx-rayYancyyesterdayzoologyzymurgyfamily city
Examples of singular nouns that end with the letter 's' are:abacusabyssalbatrossaxisbonusbrassbuscactuscanvasclassdressduressexcessexodusflossfocusfussgasgeniusglassgoddessgrassguessharnesshostessibisirisisthmuskindnesslasslenslosslotusmassmessmissmistressmossnautilusnemesisoasisonusopuspasspelvisplatypuspusradiusrecesssinusstatusstressthesaurustuberculosisviruswalrus