3
tone
2
abet(verb, support, develop, promote, encourage)
2
accelerate(verb, increase, develop, promote, stimulate)
2
accumulate(verb, increase, develop, reduce, rise)
2
adapt(verb, make, dull, place, develop)
2
adjust(verb, form, make, dull, place)
2
amalgamate(verb, close, set, charge, fix)
2
amass(verb, increase, develop, reduce, secure)
2
appreciate(verb, increase, develop, improve, swell)
2
arrange(verb, form, make, place, fix)
2
assemble(verb, form, make, get, place)
2
assure(encourage, inspire, fortify, reinforce, uplift)
2
bake(verb, close, set, fix, settle)
2
balloon(increase, mount, soar)
2
band(verb, hold, meet, develop, secure)
2
batten(verb, hold, secure, join, fasten)
2
belt(verb, hold, secure, join, fasten)
2
bloom(verb, encourage, swell, uphold, grow)
2
bond(verb, hold, secure, join, connect)
2
brighten(verb, increase, encourage, raise, severe)
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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>