69 entries under adjective topic. ×
| longitudinal | |
| high(sharp, course, quick, rash) | |
| on end(expression, straight, upright, erect) | |
| sudden(sharp, sheer, vertical) | |
| true | |
| upended(straight, erect, vertical, upstanding) | |
| acclivitous | |
| arduous(sharp, course, quick, rash) | |
| arrect(firm, straight, upright) | |
| cocked(firm, straight, upright, steep) | |
| crosswise | |
| declivitous(sharp, course, sheer, vertical) | |
| elevated(sharp, firm, course, straight) | |
| natural | |
| precipitate(sharp, course, quick, rash) | |
| raised(sharp, firm, course, straight) | |
| standing up(verb, phrasal verb, verticality) | |
| unbent | |
| undeviating | |
| unswerving |
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| APA | Smart Define. (2015). perpendicular thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/perpendicular/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "perpendicular thesaurus" https://smartdefine.org/perpendicular/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, perpendicular thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/perpendicular/thesaurus/synonyms>. |
| MLA | Smart Define. "perpendicular thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/perpendicular/thesaurus/synonyms> |