inalterable vs final

inalterable is not a noun while final is a noun.

Word	Noun	Adjective	Verb	Adverb
inalterable	No	Yes	No	No
final	Yes	Yes	No	No

inalterable (noun)	final (noun)
	an examination administered at the end of an academic term
	the final match between the winners of all previous matches in an elimination tournament

inalterable (adjective)	final (adjective)
not capable of being changed or altered	occurring at or forming an end or termination
	conclusive in a process or progression
	not to be altered or undone