- Definitions|1
- Thesaurus|229
- Abbreviations|0
8 entries under sound topic. ×
| reasonable | |
| sensible(adjective, reasonable) | |
| rational(adjective, reasonable) | |
| sane(adjective, reasonable) | |
| astute(adjective, reasonable) | |
| commonsensical(adjective, reasonable) | |
| levelheaded(adjective, reasonable) | |
| shrewd(adjective, reasonable) |
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| APA | Smart Define. (2015). hard-headed thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/hard-headed/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "hard-headed thesaurus" https://smartdefine.org/hard-headed/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, hard-headed thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/hard-headed/thesaurus/synonyms>. |
| MLA | Smart Define. "hard-headed thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/hard-headed/thesaurus/synonyms> |