39
philosophy(noun, action, knowledge, attitude, idea)
36
cause(noun, feature, support, regulation, action)
30
rationale(noun, action, good, feeling, understanding)
24
justification(noun, support, action, cause, start)
22
rationality(noun, knowledge, mind, connection, sense)
22
understanding(noun, form, end, feeling, philosophy)
21
basis(noun, action, cause, start, substance)
20
purpose(noun, form, help, end, feeling)
19
mind(noun, verb, feeling, understanding, consider)
18
intellect(noun, feeling, understanding, power, energy)
18
ground(noun, support, regulation, cause, start)
17
excuse(noun, verb, action, cause, resolve)
17
wisdom(noun, feeling, understanding, power, knowledge)
15
motive(noun, action, end, drive, cause)
15
intelligence(noun, feeling, understanding, power, turn)
15
explanation(noun, support, action, cause, trick)
14
sense(noun, verb, form, end, feeling)
14
grounds(noun, action, information, cause, trick)
14
proof(noun, support, action, cover, cause)
13
sanity(noun, health, feeling, understanding, power)
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APASmart Define. (2016). Reason thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/reason/thesaurus/synonyms
ChicagoSmart Define. 2016. "Reason thesaurus" https://smartdefine.org/reason/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, Reason thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/reason/thesaurus/synonyms>.
MLASmart Define. "Reason thesaurus" 25 February 2016. Web. 20 September 2026. <https://smartdefine.org/reason/thesaurus/synonyms>