As nouns the difference between terms and mouthes
is that terms is while mouthes is (archaic|dialectal).
As a verb mouthes is
(archaic|dialectal) (mouth).
terms
English
Noun
(head)
Statistics
*
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mouthes
English
Noun
(head)
(archaic, dialectal)
Verb
(head)
(archaic, dialectal) (mouth)