29 entries under substantial topic. ×

25
discernible(adjective, clear, knowledge, sensitive)
22
perceivable(adjective, clear, open, knowledge)
22
visible(adjective, clear, see, obvious)
19
evident(adjective, clear, see, plain, unusual)
19
noticeable(adjective, clear, see, knowledge, plain)
15
apparent(adjective, clear, see, obvious)
15
obvious(adjective, clear, see, visible)
13
manifest(adjective, clear, see, plain, unusual)
11
plain(adjective, clear, see, obvious)
10
recognizable(adjective, clear, significant, sensitive)
10
tangible(adjective, sensitive, real, obvious)
9
appreciable(adjective, knowledge, obvious, visible)
8
sensible(adjective, knowledge, significant, definite)
6
distinguishable(adjective, clear, knowledge, obvious)
4
marked(adjective, clear, see, serious)
3
clear-cut(adjective, see, significant, definite)
3
definite(significant, obvious, considerable, noticeable)
3
material(adjective, significant, definite, considerable)
3
pronounced(adjective, clear, see, serious)
1
ascertainable(significant, definite, considerable)
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APASmart Define. (2015). observable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/observable/thesaurus/synonyms
ChicagoSmart Define. 2015. "observable thesaurus" https://smartdefine.org/observable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, observable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/observable/thesaurus/synonyms>.
MLASmart Define. "observable thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/observable/thesaurus/synonyms>