| foreground | |
| fortify(verb, support, increase, boost, sustain) | |
| freckle | |
| furrow | |
| gash | |
| give emphasis(verb, mark, emphasize) | |
| give importance to(verb, phrasal verb, importance, indication) | |
| go over(verb, sound, say, pronunciation) | |
| hachure | |
| hairline | |
| harden(verb, support, increase, boost, sustain) | |
| hatch | |
| hatching | |
| heading | |
| heat up(verb, expression, support, increase, boost) | |
| highlighting | |
| hit(charge, mark, maintain, assert, stress) | |
| hype(verb, support, increase, boost, sustain) | |
| illuminate | |
| importance |
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| APA | Smart Define. (2015). underline thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/underline/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "underline thesaurus" https://smartdefine.org/underline/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, underline thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/underline/thesaurus/synonyms>. |
| MLA | Smart Define. "underline thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/underline/thesaurus/synonyms> |