I. noun
1.
Synonyms: explanation 2, account, justification, rationale, rationalization
2.
Synonyms: motive 1, cause, consideration, spring
3.
a point or points that support something open to question
he soon gave sensible reasons for the proposed change
Synonyms: argument, ground, proof, wherefore, why, whyfor
Related Word: explanation, justification, rationalization
4.
Synonyms: cause 1, antecedent, determinant, occasion
5.
the power of the mind by which man attains truth or knowledge
we all must use reason to solve this problem
Synonyms: intellect, understanding
Related Word: inference, ratiocination
6.
Synonyms: wit 2, lucidity, ||marbles, mind, saneness, sanity, sense(s), soundness
II. verb
Synonyms: think 5, cerebrate, cogitate, deliberate, reflect, speculate