| antecedent(noun, support, action, base, beginning) | |
| approve | |
| arm | |
| ascending | |
| ascent | |
| ascertaining(adjective, assuring) | |
| assent(noun, approval, authorization, permission) | |
| assets(noun, substance, money, prize, property) | |
| assumption(noun, support, action, base, beginning) | |
| assuring | |
| athletic supporter | |
| attention(noun, support, help, benefit, aid) | |
| attestation | |
| authentication | |
| authority(noun, support, action, base, beginning) | |
| authorization(noun, support, favor, approval, commendation) | |
| auxiliary | |
| axial motion | |
| axiom(noun, support, action, base, beginning) | |
| back-up(noun, part) |
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| APA | Smart Define. (2016). backing thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/backing/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "backing thesaurus" https://smartdefine.org/backing/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, backing thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/backing/thesaurus/synonyms>. |
| MLA | Smart Define. "backing thesaurus" 18 March 2016. Web. 20 September 2026. <https://smartdefine.org/backing/thesaurus/synonyms> |