allegiance vs trueness

allegiance and trueness both are nouns.

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

As nouns, trueness is a hypernym of allegiance; that is, trueness is a word with a broader meaning than allegiance:

allegiance: the loyalty that citizens owe to their country (or subjects to their sovereign)
trueness: the quality of being loyal

Other hypernyms of allegiance include loyalty.

allegiance (noun)	trueness (noun)
the act of binding yourself (intellectually or emotionally) to a course of action	exactness of adjustment
the loyalty that citizens owe to their country (or subjects to their sovereign)	the quality of being loyal
	conformity to reality or actuality