494 entries under adjective topic. ×
| fearful(awful, terrible, dreadful, weird) | |
| fearsome(bad, awful, disgusting, black) | |
| felonious(wicked, vice) | |
| flagitious | |
| frightening(person, hard, severe, dark) | |
| frigid(person, unwarmhearted) | |
| ghastly(bad, awful, disgusting, sinful) | |
| glacial(person, unwarmhearted) | |
| grave(unpleasant, sorrow, depress, sadness) | |
| half-spirited(person, unwarmhearted) | |
| hardhearted(person, unwarmhearted) | |
| horrendous(bad, awful, disgusting, sinful) | |
| horrible(obscure, nasty, dark, unpleasant) | |
| icy(person, unwarmhearted) | |
| immoral | |
| improper(corrupt, wicked, unreasonable, dishonest) | |
| miserable(sad, unhappy, unpleasant, woe) | |
| monstrous(evil, awful, terrible, dreadful) | |
| mummified(person, unwarmhearted) | |
| perverse(nasty, wicked, menacing) |
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| APA | Smart Define. (2016). sinister thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/sinister/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "sinister thesaurus" https://smartdefine.org/sinister/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, sinister thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/sinister/thesaurus/synonyms>. |
| MLA | Smart Define. "sinister thesaurus" 3 April 2016. Web. 25 September 2026. <https://smartdefine.org/sinister/thesaurus/synonyms> |