allegiant vs allegiance

allegiant is not a noun while allegiance is a noun.

Word	Noun	Adjective	Verb	Adverb
allegiant	No	Yes	No	No
allegiance	Yes	No	No	No

allegiant (noun)	allegiance (noun)
	the act of binding yourself (intellectually or emotionally) to a course of action
	the loyalty that citizens owe to their country (or subjects to their sovereign)

allegiant (adjective)	allegiance (adjective)
steadfast in devotion (especially to your lawful monarch or government)