SUPPLEMENTAL Antonyms There are 10 antonyms of the word supplemental. (opposite meanings)Did you mean?Definition of SUPPLEMENTALSynonyms of SUPPLEMENTALAlso try opposite words for..supplementationBest Opposite Words For SUPPLEMENTALTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1centraladjectiveadj2corenoun, adjectiven, adj3crucialadjectiveadj4essentialadjectiveadj5fundamentaladjectiveadj6integralnounn7mainnoun, adjectiven, adj8necessaryadverb, adjectiveadv, adj9primarynoun, adjectiven, adj10principalnounn Alternatives for CENTRAL Words (18)mainprincipalfundamentalkeybasiccentralizedcorecrucialessentialfocalmiddlepivotalprimaryprimedominantcardinalexchangeprimalPhrases (1)telephone exchangeOpposite words for central Alternatives for CORE Words (20)essencecentercruxheartkernelnucleusgistburdencentreeffecthomerinwardnessmarrowmeatnitty-grittynubpithsubstancesumomerPhrases (4)congress of racial equalitycore groupheart and soulmagnetic coreOpposite words for core Alternatives for CRUCIAL Words (17)essentialimportantcriticaldecisivefundamentalimperativeindispensableintegralkeymomentousnecessaryparamountpivotalsignificantsubstantivevitalall-importantPhrases (1)of the essenceOpposite words for crucial Alternatives for ESSENTIAL Words (16)crucialindispensablenecessaryrequisitebasicfundamentalimperativeimportantkeyprimarysignificantvitalall-importantnecessityrequirementsubstantivePhrases (1)of the essenceOpposite words for essential Alternatives for FUNDAMENTAL Words (20)keyrudimentaryunderlyingbasiccorecrucialelementaryessentialimportantindispensableintrinsicnecessaryprimaryprincipalvitalfoundationalcardinalcentralprimalprofoundPhrases (2)first harmonicfundamental frequencyOpposite words for fundamental Alternatives for INTEGRAL Words (20)necessarycorecrucialessentialfundamentalimportantindispensableintrinsickeyprimaryprincipalvitalinherentimmanentantiderivativebuilt-inconstitutionalentireinbuiltintactPhrases (1)indefinite integralOpposite words for integral Alternatives for MAIN Words (14)chiefprimaryprincipalcentralessentialfundamentalkeyleadingmajorpredominantlargestbrinyindependentmasterOpposite words for main Alternatives for NECESSARY Words (17)essentialrequisitecompulsorycrucialimperativeimportantindispensablemandatoryneededneedfulobligatoryrequiredvitalinevitablenaturalnecessityrequirementOpposite words for necessary