appellate vs appellant

appellate is not a noun while appellant is a noun.

Word	Noun	Adjective	Verb	Adverb
appellate	No	Yes	No	No
appellant	Yes	Yes	No	No

As adjectives, appellate and appellant are synonyms defined as:

appellate and appellant: of or relating to or taking account of appeals (usually legal appeals)

appellate (noun)	appellant (noun)
	the party who appeals a decision of a lower court

appellate (adjective)	appellant (adjective)
of or relating to or taking account of appeals (usually legal appeals)	of or relating to or taking account of appeals (usually legal appeals)