consonant vs consistent

consonant is a noun but consistent is not a noun.

Word	Noun	Adjective	Verb	Adverb
consonant	Yes	Yes	No	No
consistent	No	Yes	No	No

consonant (noun)	consistent (noun)
a speech sound that is not a vowel
a letter of the alphabet standing for a spoken consonant

consonant (adjective)	consistent (adjective)
in keeping	(sometimes followed by `with') in agreement or consistent or reliable
involving or characterized by harmony	marked by an orderly, logical, and aesthetically consistent relation of parts
	capable of being reproduced
	the same throughout in structure or composition