166 entries under tough topic. ×
| strong as an ox(expression, adjective, idiom, strong, great) | |
| unimpaired(strong, fit, fresh, well) | |
| well-founded(adjective, strong, sound, secure) | |
| well-made(adjective, strong, sound, solid) | |
| zappy(adjective, strong, fit, healthy) | |
| zealous(adjective, strong, energetic, enthusiastic) | |
| adamant(adjective, strong, hard, sturdy) | |
| trim(adjective, strong, great, sound) | |
| bouncy(strong, active, peppy, bouncing) | |
| bullheaded(adjective, strong, hard, sturdy) | |
| by the book(expression, adjective, idiom, strong, hard) | |
| disciplinary(adjective, strong, hard, sturdy) | |
| dyed-in-the-wool(adjective, strong, hard, sturdy) | |
| ferric(adjective, strong, hard, sturdy) | |
| ferrous(adjective, strong, hard, sturdy) | |
| flexible(adjective, strong, hardy) | |
| flinty(adjective, strong, hard, solid) | |
| forbidding(adjective, strong, hard, sturdy) | |
| frowning(adjective, strong, hard, sturdy) | |
| grim(adjective, strong, hard, sturdy) |
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| APA | Smart Define. (2016). robust thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/robust/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "robust thesaurus" https://smartdefine.org/robust/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, robust thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/robust/thesaurus/synonyms>. |
| MLA | Smart Define. "robust thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/robust/thesaurus/synonyms> |