| higher | |
| huge(adjective, successful) | |
| in ascendancy | |
| in the ascendant(expression, idiom) | |
| in the beginning(expression, adjective, idiom, head, beginning) | |
| in the distance(expression, idiom, out, away, off) | |
| in the front(expression, idiom) | |
| in the future | |
| in the lead-up to | |
| inaugural(adjective, head, beginning, opening, original) | |
| inceptive(adjective, head, beginning, opening, original) | |
| incipient(adjective, head, beginning, opening, original) | |
| infront | |
| initial(adjective, head, beginning, opening, original) | |
| into(adverb, out, forward, outward, onward) | |
| into prominence(expression, advanced, forward, up, onward) | |
| into view(expression, advanced, forward, up, onward) | |
| introductory(adjective, head, beginning, opening, original) | |
| inverse | |
| issue |
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| APA | Smart Define. (2016). ahead thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/ahead/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "ahead thesaurus" https://smartdefine.org/ahead/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, ahead thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/ahead/thesaurus/synonyms>. |
| MLA | Smart Define. "ahead thesaurus" 17 February 2016. Web. 22 September 2026. <https://smartdefine.org/ahead/thesaurus/synonyms> |