1
close-grained(hard, tough, solid, rigid, inflexible)
1
close-knit
1
close-textured
1
close-woven
1
coherent
1
cohesive
1
compacted
1
congealed(hard, tough, solid, rigid, inflexible)
1
congested
1
consolidated
1
constipated
1
crammed
1
crammed full
1
crowded
1
crystalline
1
fine-grained(hard, tough, solid, rigid, inflexible)
1
gnarled
1
hardened(hard, tough, solid, rigid, inflexible)
1
impervious(hard, tough, solid, rigid, inflexible)
1
imporous
11 years ago|1.8k views|share |citing 
APASmart Define. (2015). nonporous thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/nonporous/thesaurus/synonyms
ChicagoSmart Define. 2015. "nonporous thesaurus" https://smartdefine.org/nonporous/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, nonporous thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/nonporous/thesaurus/synonyms>.
MLASmart Define. "nonporous thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/nonporous/thesaurus/synonyms>