WHAT Antonyms There are 7 antonyms of the word what. (opposite meanings)Did you mean?Definition of WHATAlso try opposite words for..whateverwhatnesswhatsoeverBest Opposite Words For WHATTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1whonounn2why3howadverbadv4whenadverbadv5whereadverbadv6which7whom Alternatives for WHY Words (1)whereforeOpposite words for why Alternatives for WHEN Words (8)butimmediatelyoncewhilewheneverwherewhereaswhilstOpposite words for when