48 entries under adjective topic. ×
| milestone(noun, mark, sign, point) | |
| benchmark(noun, information, mark, sign) | |
| groundbreaking(momentous, milestone) | |
| historic(momentous, milestone) | |
| momentous | |
| significant(momentous, milestone) | |
| innovative(momentous, milestone) | |
| precedent-setting | |
| seminal | |
| breakthrough(noun, mark, sign, revolution) | |
| circumstantial | |
| episodic | |
| eventual | |
| imaginative | |
| incidental | |
| inconclusive | |
| indirect | |
| inferential | |
| innovatory(momentous, milestone) | |
| new |
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| APA | Smart Define. (2015). landmark thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/landmark/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "landmark thesaurus" https://smartdefine.org/landmark/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, landmark thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/landmark/thesaurus/synonyms>. |
| MLA | Smart Define. "landmark thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/landmark/thesaurus/synonyms> |