- Definitions|2
- Thesaurus|333
- Abbreviations|0
| augment(strengthen, buttress) | |
| be behind(expression, idiom) | |
| be in effect(verb, continue, stay, extend, sustain) | |
| be in force(verb, continue, stay, extend, sustain) | |
| be the case(verb, continue, stay, extend, sustain) | |
| be valid(verb, continue, stay, extend, sustain) | |
| beef up(expression, strengthen, buttress) | |
| bolster up(verb, expression, phrasal verb) | |
| boost(strengthen, buttress) | |
| build up(expression, strengthen, buttress) | |
| buoy | |
| call(verb, continue, stay, extend, sustain) | |
| carry on(verb, expression, continue, stay, extend) | |
| cementing | |
| championing | |
| comprise | |
| conduct meeting(verb, expression, continue, stay, extend) | |
| contain | |
| convene(verb, continue, stay, extend, sustain) | |
| correspond |
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| APA | Smart Define. (2015). underpin thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/underpin/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "underpin thesaurus" https://smartdefine.org/underpin/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, underpin thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/underpin/thesaurus/synonyms>. |
| MLA | Smart Define. "underpin thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/underpin/thesaurus/synonyms> |