- Definitions|2
- Thesaurus|1.4k
- Abbreviations|0
| fallen between cracks(expression, idiom, out, hidden, missing) | |
| fine | |
| forfeit(confused, out, hidden, lost, unchangeable) | |
| forfeited(confused, out, hidden, lost, unchangeable) | |
| formless | |
| fuzzy | |
| germinal | |
| gone(confused, out, hidden, lost, bewildered) | |
| gone astray(expression, out, hidden, lost, missing) | |
| gradual | |
| granular | |
| heavenly(obscure, dark, superior, mysterious, supernatural) | |
| hermetic(obscure, dark, deep, mysterious, unknown) | |
| hermetical(obscure, dark, secret, unknown, hidden) | |
| homoeopathic | |
| ill-defined | |
| imperceivable(adjective, obscure, dark, secret, unknown) | |
| in the dark(expression, idiom, obscure, dark, unknown) | |
| indefinite | |
| indiscoverable |
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| APA | Smart Define. (2015). invisible thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/invisible/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "invisible thesaurus" https://smartdefine.org/invisible/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, invisible thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/invisible/thesaurus/synonyms>. |
| MLA | Smart Define. "invisible thesaurus" 7 December 2015. Web. 24 September 2026. <https://smartdefine.org/invisible/thesaurus/synonyms> |