invariable vs consistent

invariable is a noun but consistent is not a noun.

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

invariable (noun)	consistent (noun)
a quantity that does not vary

invariable (adjective)	consistent (adjective)
not liable to or capable of change	(sometimes followed by `with') in agreement or consistent or reliable
	marked by an orderly, logical, and aesthetically consistent relation of parts
	capable of being reproduced
	the same throughout in structure or composition