6
encourage(verb, stimulate, excite, prepare, boost)
6
inspirit(verb, encourage, excite, prepare, boost)
6
invigorate(verb, support, increase, encourage, strength)
6
prepare(verb, support, make, get, fix)
6
rally(verb, encourage, excite, prepare, boost)
6
stiffen(verb, dull, close, set, fix)
6
temper(verb, close, set, fix, settle)
6
toughen(verb, support, close, set, fix)
5
embolden(verb, encourage, excite, prepare, boost)
5
cement(verb, close, set, fix, settle)
5
indurate(verb, dull, close, set, fix)
5
inure(verb, dull, develop, rough, prepare)
5
metal(adjective, element)
5
sabre(noun, thing, cutter, sickle, blade)
5
steely(adjective, strong, hard, tough, sturdy)
4
bone(strength, hardness)
4
buck up(verb, expression, phrasal verb, encourage, excite)
4
buttress(verb, support, close, set, fix)
4
emery(noun, sharpness)
4
firm(noun, verb, adjective, close, set)
10 years ago|18k views|share |citing 
APASmart Define. (2016). steel thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/steel/thesaurus/synonyms
ChicagoSmart Define. 2016. "steel thesaurus" https://smartdefine.org/steel/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, steel thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/steel/thesaurus/synonyms>.
MLASmart Define. "steel thesaurus" 24 January 2016. Web. 28 September 2026. <https://smartdefine.org/steel/thesaurus/synonyms>