6
atomic(adjective, smallness, littleness)
6
infinitesimal(adjective, smallness, littleness)
6
microscopic(adjective, smallness)
6
molecular(adjective, smallness, littleness, microscopic)
5
corpuscular(adjective, smallness, littleness)
5
invisible
4
evanescent(smallness, littleness)
4
inappreciable(smallness, littleness)
3
embryonic
3
impalpable
3
imperceptible
3
intangible
2
inconsiderable
2
insignificant
2
minor
2
small
1
atomatic
1
atomiferous
1
atomistic
1
cyclic
11 years ago|2.2k views|share |citing 
APASmart Define. (2015). subatomic thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/subatomic/thesaurus/synonyms
ChicagoSmart Define. 2015. "subatomic thesaurus" https://smartdefine.org/subatomic/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, subatomic thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/subatomic/thesaurus/synonyms>.
MLASmart Define. "subatomic thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/subatomic/thesaurus/synonyms>