lodgment vs fixity

lodgment and fixity both are nouns.

Word	Noun	Adjective	Verb	Adverb
lodgment	Yes	No	No	No
fixity	Yes	No	No	No

As nouns, fixity is a hypernym of lodgment; that is, fixity is a word with a broader meaning than lodgment:

Other hypernyms of lodgment include fastness, fixedness, fixture, secureness, allegation.

lodgment (noun)	fixity (noun)
the state or quality of being lodged or fixed even temporarily	the quality of being fixed in place as by some firm attachment
	the quality of being incapable of mutation