- Definitions|1
- Thesaurus|340
- Abbreviations|0
65 entries under adjective topic. ×
| tried | |
| trustworthy | |
| unassailable | |
| warranted | |
| watertight | |
| correct(clean, perfect, pure, flawless) | |
| exemplary | |
| ideal(correct, clean, perfect, pure) | |
| idiot-proof | |
| immaculate(correct, clean, perfect, pure) | |
| irreproachable | |
| never-failing | |
| plain | |
| sound(pure, splendid, flawless, faultless) | |
| unending | |
| unflagging | |
| unflawed(perfect, flawless, faultless, textbook) | |
| unimpeachable | |
| bang on | |
| ceaseless |
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| APA | Smart Define. (2015). foolproof thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/foolproof/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "foolproof thesaurus" https://smartdefine.org/foolproof/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, foolproof thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/foolproof/thesaurus/synonyms>. |
| MLA | Smart Define. "foolproof thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/foolproof/thesaurus/synonyms> |