13
porous(adjective, spongy, permeable, perforated, absorbent)
9
pervious(adjective, accessible, spongy, porous, permeable)
8
open(adjective, sensitive, apt, likely, liable)
7
permeable(adjective, spongy, porous)
7
vulnerable(adjective, open, sensitive, apt, likely)
5
airy
5
liable(adjective, open, sensitive, apt, likely)
4
accessible(adjective, safe, permeable, travelable, drivable)
4
passable(adjective, safe, permeable, travelable, drivable)
4
receptive(adjective, permeable)
4
susceptible(adjective, open, sensitive, apt, likely)
3
absorbent(adjective, liquid, spongy, porous, permeable)
3
filigree
2
approachable
2
assailable(adjective, open, sensitive, apt, likely)
2
attackable(adjective, open, sensitive, apt, likely)
2
beatable(adjective, open, sensitive, apt, likely)
2
conquerable(adjective, open, sensitive, apt, likely)
2
cushiony
2
doughy
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APASmart Define. (2015). penetrable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/penetrable/thesaurus/synonyms
ChicagoSmart Define. 2015. "penetrable thesaurus" https://smartdefine.org/penetrable/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, penetrable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/penetrable/thesaurus/synonyms>.
MLASmart Define. "penetrable thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/penetrable/thesaurus/synonyms>