Synonyms|135Antonyms|8|Broader|0Narrower|2Related|2

17 entries under strengthen topic. ×

1
toughen(verb, harden)
0
acclimate(verb, harden)
0
acclimatize(verb, harden)
0
anneal(verb, harden)
0
beef up(expression, harden)
0
brutalize(verb, harden)
0
build up(expression, harden)
0
climatize(verb, harden)
0
develop(verb, harden)
0
firm up(expression, harden)
0
fortify
0
harden
0
inure(verb, harden)
0
reinforce
0
season(verb, harden)
0
shore up(expression, harden)
0
temper(verb, harden)
For more, visit Make_difficult on Power Thesaurus
13 years ago|341 views|share |citing 
APASmart Define. (2013). make difficult thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/make_difficult/thesaurus/synonyms
ChicagoSmart Define. 2013. "make difficult thesaurus" https://smartdefine.org/make_difficult/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2013, make difficult thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/make_difficult/thesaurus/synonyms>.
MLASmart Define. "make difficult thesaurus" 18 May 2013. Web. 22 September 2026. <https://smartdefine.org/make_difficult/thesaurus/synonyms>