- Definitions|2
- Thesaurus|252
- Abbreviations|0
| germinal | |
| gradual(adjective, imperceptible) | |
| granular | |
| heavenly(incorporeal, nonmaterial) | |
| illusory(light, weak, slight, negative, subtle) | |
| immensurable | |
| imponderous(adjective, levity) | |
| inconspicuous(adjective, imperceptible) | |
| indistinct(adjective, imperceptible) | |
| insignificant(adjective, imperceptible) | |
| metaphysical(light, weak, slight, heavenly, flimsy) | |
| microcosmic | |
| minute(adjective, imperceptible) | |
| molecular | |
| momentary(adjective, impulsive, unpredictable, subtle, imperceptible) | |
| nonexistent(adjective, real, fictional) | |
| nonsubstantial | |
| obscure | |
| occult | |
| otherworldly |
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| APA | Smart Define. (2015). imponderable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/imponderable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "imponderable thesaurus" https://smartdefine.org/imponderable/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, imponderable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/imponderable/thesaurus/synonyms>. |
| MLA | Smart Define. "imponderable thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/imponderable/thesaurus/synonyms> |