deed vs mortgage deed

deed and mortgage deed both are nouns.

Word	Noun	Adjective	Verb	Adverb
deed	Yes	No	No	No
mortgage deed	Yes	No	No	No

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

deed: a legal document signed and sealed and delivered to effect a transfer of property and to show the legal right to possess it
mortgage deed: deed embodying a mortgage

Other hyponyms of deed include bill of sale, deed poll, enfeoffment, title deed.

deed (noun)	mortgage deed (noun)
something that people do or cause to happen	deed embodying a mortgage
a legal document signed and sealed and delivered to effect a transfer of property and to show the legal right to possess it