invariable vs invariant

invariable and invariant both are nouns.

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

invariable (noun)	invariant (noun)
a quantity that does not vary	a feature (quantity or property or function) that remains unchanged when a particular transformation is applied to it

invariable (adjective)	invariant (adjective)
not liable to or capable of change	unvarying in nature
	unaffected by a designated operation or transformation