debitor vs mortgager

debitor and mortgager both are nouns.

Word	Noun	Adjective	Verb	Adverb
debitor	Yes	No	No	No
mortgager	Yes	No	No	No

As nouns, mortgager is a hyponym of debitor; that is, mortgager is a word with a more specific, narrower meaning than debitor:

debitor: a person who owes a creditor; someone who has the obligation of paying a debt
mortgager: the person who gives a mortgage in return for money to be repaid

Other hyponyms of debitor include deadbeat, defaulter, fly-by-night, mortgagor.

debitor (noun)	mortgager (noun)
a person who owes a creditor; someone who has the obligation of paying a debt	the person who gives a mortgage in return for money to be repaid