Synonyms|270Antonyms|105|Broader|3Narrower|13Related|183

40 entries under extend topic. ×

14
brace(verb, support, close, set, fix)
13
harden(verb, support, close, set, increase)
12
fortify(verb, support, close, set, fix)
11
reinforce(verb, support, close, set, fix)
8
anneal(verb, support, close, set, fix)
7
confirm(verb, support, increase, establish)
7
invigorate(verb, support, increase, encourage, establish)
5
buttress(verb, support, close, set, fix)
5
support(verb, increase, establish, sustain)
4
intensify(verb, support, increase, establish)
4
steel(verb, support, close, set, fix)
2
bolster(verb, support, increase, establish)
2
empower(verb, support, increase, establish)
2
enhance(verb, support, increase, establish)
2
rejuvenate(verb, support, increase, encourage, establish)
2
sustain(verb, support, increase, keep, overcome)
1
add(verb, support, increase, establish)
1
add fuel to fire(verb, expression, idiom, support, increase)
1
ascend(verb, support, increase, establish)
1
build up(verb, expression, phrasal verb, support, increase)
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APASmart Define. (2015). toughen thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/toughen/thesaurus/synonyms
ChicagoSmart Define. 2015. "toughen thesaurus" https://smartdefine.org/toughen/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, toughen thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/toughen/thesaurus/synonyms>.
MLASmart Define. "toughen thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/toughen/thesaurus/synonyms>