English dictionary, thesaurus, translations & etymology

strengthen

18 synonyms and 5 antonyms for strengthen, ranked by how commonly they're used.

Verb — To make something stronger, more solid, or more effective.

Synonyms for strengthen

anneal brace build up confirm enstrengthen fortify harden intend indurate munite invigorate nerve nerve up reinforce roborate steel strength thicken

weaken atrophy debilitate enervate enfeeble

Synonyms and antonyms from Wiktionary, CC BY-SA.