71 entries under substantial topic. ×
| fixed(adjective, strong, sound, secure, tough) | |
| heavy-duty(adjective, strong, sound, tough, solid) | |
| immovable(adjective, strong, hard, secure, tough) | |
| in fine feather(expression, adjective, idiom, strong, sound) | |
| reinforced(adjective, strong, sound, tough, solid) | |
| rooted(strong, secure, stable, unmoving) | |
| stark(adjective, strong, hard, sound, tough) | |
| well-founded(adjective, strong, sound, secure, tough) | |
| well-made(adjective, strong, sound, tough, solid) | |
| anchored(strong, secure, stable, unmoving) | |
| bolted(strong, secure, stable, unmoving) | |
| braced(strong, secure, stable, unmoving) | |
| cemented(strong, secure, stable, unmoving) | |
| closed(strong, secure, stable, unmoving) | |
| embedded(strong, secure, stable, unmoving) | |
| fastened(strong, secure, stable, unmoving) | |
| immobile(strong, secure, stable, unmoving) | |
| motionless(strong, secure, stable, unmoving) | |
| mounted(strong, secure, stable, unmoving) | |
| nailed(strong, secure, stable, unmoving) |
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| APA | Smart Define. (2016). robust thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/robust/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "robust thesaurus" https://smartdefine.org/robust/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, robust thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/robust/thesaurus/synonyms>. |
| MLA | Smart Define. "robust thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/robust/thesaurus/synonyms> |