ASSUMPTION Antonyms There are 5 antonyms of the word assumption. (opposite meanings)Did you mean?Definition of ASSUMPTIONSynonyms of ASSUMPTIONAlso try opposite words for..assumeassumesassumedassumingassumptiveBest Opposite Words For ASSUMPTIONTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1certaintynounn2evidencenounn3factnounn4realitynounn5truthnounn Alternatives for CERTAINTY Words (15)surenessassuranceconclusivenessconfidenceconvictiondecisivenessdefinitenessdeterminationfirmnesspositivityreliabilitysafetysecuritysuretycertitudePhrases (2)sure thingforegone conclusionOpposite words for certainty Alternatives for EVIDENCE Words (24)attestationclueconfirmationcorroborationdemonstrationdocumentationexhibitillustrationindicationmanifestationproofsignsubstantiationtestimonyverificationattestcertifydemonstrategroundsmanifestproveshowtelltestifyPhrases (1)bear witnessOpposite words for evidence Alternatives for FACT Words (10)accuracyactualityauthenticitycertaintycertitudegenuinenessrealitysuretytruthverityOpposite words for fact Alternatives for REALITY Words (5)actualityrealismrealnesstruthworldOpposite words for reality Alternatives for TRUTH Words (16)accuracyverityactualityauthenticitycorrectnessexactnessfactgenuinenesshonestyintegrityprecisionrealitysincerityvalidityveracitytruenessPhrases (3)sojourner truththe truetrue statementOpposite words for truth