mortgager vs debtor

mortgager and debtor both are nouns.

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

As nouns, debtor is a hypernym of mortgager; that is, debtor is a word with a broader meaning than mortgager:

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

Other hypernyms of mortgager include debitor.

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