71 entries under substantial topic. ×

19
unyielding(adjective, strong, hard, sound, tough)
18
mighty(adjective, person, body, strong, great)
15
able-bodied(adjective, person, body, strong, great)
15
athletic(adjective, person, body, strong, sound)
14
energetic(adjective, strong, sound, tough, fit)
12
sinewy(adjective, strong, hard, sound, tough)
10
potent(adjective, strong, great, sound, strength)
10
active(adjective, strong, sound, tough, fit)
10
solid(adjective, person, body, strong, sound)
6
forceful(adjective, strong, great, sound, tough)
6
staunch(noun, adjective, health, strong, sound)
6
well-built(adjective, person, body, strong, sound)
6
forcible(adjective, strong, sound, strength, tough)
4
big(adjective, person, body, strong, sound)
3
secure(verb, adjective, strong, sound, tough)
2
hard as nails(expression, adjective, idiom, strong, hard)
2
heavy(adjective, person, body, strong, hard)
2
tenacious(adjective, strong, sound, secure, tough)
1
able(adjective, strong, sound, tough, fit)
1
capable(adjective, strong, sound, tough, fit)
10 years ago|33k views|share |citing 
APASmart Define. (2016). robust thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/robust/thesaurus/synonyms
ChicagoSmart Define. 2016. "robust thesaurus" https://smartdefine.org/robust/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, robust thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/robust/thesaurus/synonyms>.
MLASmart Define. "robust thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/robust/thesaurus/synonyms>