Porous Thesaurus / Antonyms

10	impermeable
7	impenetrable(adjective, dense)
6	compact
4	nonporous
4	impervious
3	airtight
2	tight
2	piercing
1	close
1	dense
1	impassable
0	waterproof
0	watertight
-1	firm
-1	leakproof
-1	selfish
-1	consistent
-1	constipated
-1	costive
-1	formal

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APA	Smart Define. (2015). porous thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/porous/thesaurus/antonyms
Chicago	Smart Define. 2015. "porous thesaurus" https://smartdefine.org/porous/thesaurus/antonyms (accessed September 28, 2026).
Harvard	Smart Define 2015, porous thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/porous/thesaurus/antonyms>.
MLA	Smart Define. "porous thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/porous/thesaurus/antonyms>

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