Synonyms|95Antonyms|1|Broader|0Narrower|0Related|7

60 entries under strong topic. ×

6
ferric(adjective, hard, tough, sturdy)
6
iron(noun, adjective, hard, tough)
3
steel(adjective, hard, tough, sturdy)
2
steely(adjective, hard, tough, sturdy)
1
dense(adjective, hard, tough, sturdy)
0
adamant(adjective, hard, tough, sturdy)
0
adamantine(adjective, hard, tough, sturdy)
0
astringent(adjective, hard, tough, sturdy)
0
austere(adjective, hard, tough, sturdy)
0
authoritarian(adjective, hard, tough, sturdy)
0
bitter(adjective, hard, tough, sturdy)
0
bullheaded(adjective, hard, tough, sturdy)
0
by the book(expression, adjective, idiom, hard)
0
determined(adjective, hard, tough)
0
disciplinary(adjective, hard, tough, sturdy)
0
dyed-in-the-wool(adjective, hard, tough, sturdy)
0
firm(adjective, hard, tough, sturdy)
0
flinty(adjective, hard, tough, sturdy)
0
forbidding(adjective, hard, tough, sturdy)
0
frowning(adjective, hard, tough, sturdy)
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APASmart Define. (2015). ferrous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/ferrous/thesaurus/synonyms
ChicagoSmart Define. 2015. "ferrous thesaurus" https://smartdefine.org/ferrous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, ferrous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/ferrous/thesaurus/synonyms>.
MLASmart Define. "ferrous thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/ferrous/thesaurus/synonyms>