| stick up for(verb, expression, idiom, support, hold) | |
| term | |
| two(noun, adjective, adverb, double, duplication) | |
| two-sided(adjective, double, duplication) | |
| underwrite(verb, support, praise, encourage, favor) | |
| unimportant(adjective, lower, inferior, insignificant, last) | |
| 2nd | |
| accomplice(noun, assistant) | |
| accredit(verb, support, accept, praise, favor) | |
| additional(adjective, counterfeit, spare, near, reserve) | |
| affirm(verb, support, accept, favor, agree) | |
| aider(noun, assistant) | |
| ancillary(noun, adjective, spare, inferior, extra) | |
| arcsecond | |
| attorney(noun, agent, assistant, deputy) | |
| authenticate(verb, support, favor, back, approve) | |
| befriend(verb, support, help, develop, maintain) | |
| bifacial | |
| bifold(adjective, like, similar, identical, duplication) | |
| biform |
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| APA | Smart Define. (2016). second thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/second/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "second thesaurus" https://smartdefine.org/second/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, second thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/second/thesaurus/synonyms>. |
| MLA | Smart Define. "second thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/second/thesaurus/synonyms> |