Synonyms of strengthens

1 Syllable

steel, wax, add, tone, rise, mount

2 Syllables

support, renew, buttress, harden, temper, toughen, ascend, confirm, brace, heighten, extend, bolster, sustain, anneal, sinew

3 Syllables

multiply, enhance, increase, establish, restore, justify, fortify, reinforce, empower, enlarge

4 Syllables

intensify, substantiate

5 Syllables

regenerate, corroborate, rejuvenate, invigorate