Synonyms|182Antonyms|80|Broader|2Narrower|0Related|667

14 entries under closure topic. ×

18
impenetrable(adjective, solid, dense, unaffected, unyielding)
11
impervious(adjective, solid, unreasonable, useless, absurd)
7
impermeable(adjective, solid, dense, unaffected, unyielding)
7
unpassable
5
pathless(adjective, closed)
2
untrodden(adjective, closed)
1
imperforate
0
caecal
0
closable
0
imporous
0
invious
0
unpierced
0
untrod
0
wayless
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APASmart Define. (2015). impassable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/impassable/thesaurus/synonyms
ChicagoSmart Define. 2015. "impassable thesaurus" https://smartdefine.org/impassable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, impassable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/impassable/thesaurus/synonyms>.
MLASmart Define. "impassable thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/impassable/thesaurus/synonyms>