LOCKBOX Antonyms There are 2 antonyms of the word lockbox. (opposite meanings)Did you mean?Definition of LOCKBOXSynonyms of LOCKBOXAlso try opposite words for..lockboxesBest Opposite Words For LOCKBOXTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1keyverb, nounv, n2unlockverbv Alternatives for KEY Words (23)crucialessentialimportantnecessarysignificantvitalcardinalcaycentraldescribediscoverdistinguishfundamentalheadstoneidentifykeystonekilonamepaintprimalsamaratonalitywinderPhrases (4)florida keyfrancis scott keykey fruitkey outAbbreviations (1)kgOpposite words for key Alternatives for UNLOCK Words (5)openreleaseunbarunboltunfastenOpposite words for unlock