3
forward(verb, support, develop, promote, favor)
3
foster(verb, support, give, keep, develop)
3
further(verb, support, advance, increase, develop)
3
go up(verb, phrasal verb)
3
heat up(verb, expression, support, increase, raise)
3
indurate(verb, dull, close, set, fix)
3
inure(verb, dull, develop, rough, adjust)
3
make stronger(verb, expression, idiom, support, powerful)
3
modulate(verb, lacquering)
3
power(verb, control, do, invigorate, energize)
3
recondition(verb, fix, cover, encourage, return)
3
recover(verb, fix, encourage, raise, gain)
3
regenerate(verb, powerful, revive, fortify, brace)
3
repair(verb, fix, cover, encourage, raise)
3
resurrect(verb, encourage, stimulate, restore, arouse)
3
set(verb, support, hold, close, fix)
3
settle(verb, form, hold, make, close)
3
shoot up(verb, expression, get, increase, promote)
3
string(verb, hold, secure, join, fasten)
3
thicken(verb, close, set, fix, advance)
10 years ago|19k views|share |citing 
APASmart Define. (2016). strengthen thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/strengthen/thesaurus/synonyms
ChicagoSmart Define. 2016. "strengthen thesaurus" https://smartdefine.org/strengthen/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, strengthen thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/strengthen/thesaurus/synonyms>.
MLASmart Define. "strengthen thesaurus" 3 March 2016. Web. 27 September 2026. <https://smartdefine.org/strengthen/thesaurus/synonyms>