| activating(adjective, energetic, lively, active, vital) | |
| acute | |
| adventuresome | |
| aggressiveness | |
| agonistic | |
| alarming(adjective, close, nasty, ugly, menacing) | |
| alert(adjective, keen, intense, energetic, lively) | |
| alive | |
| ambush | |
| anxious(adjective, keen, intense, energetic, enthusiastic) | |
| apocalyptic(adjective, ugly, menacing, intimidating, ominous) | |
| aspiring(adjective, energetic, enthusiastic, determined, earnest) | |
| assail | |
| assaulter | |
| assaultive | |
| assertory(adjective, assertive) | |
| assiduous | |
| at loggerheads(expression, nasty, determined, hostile, spirited) | |
| attack | |
| attackman |
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| APA | Smart Define. (2016). aggressive thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/aggressive/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "aggressive thesaurus" https://smartdefine.org/aggressive/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, aggressive thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/aggressive/thesaurus/synonyms>. |
| MLA | Smart Define. "aggressive thesaurus" 10 March 2016. Web. 21 September 2026. <https://smartdefine.org/aggressive/thesaurus/synonyms> |