deed of trust vs legal document

deed of trust and legal document both are nouns.

Word	Noun	Adjective	Verb	Adverb
deed of trust	Yes	No	No	No
legal document	Yes	No	No	No

As nouns, legal document is a hypernym of deed of trust; that is, legal document is a word with a broader meaning than deed of trust:

deed of trust: a written instrument legally conveying property to a trustee often used to secure an obligation such as a mortgage or promissory note
legal document: (law) a document that states some contractual relationship or grants some right

Other hypernyms of deed of trust include instrument, legal instrument, official document.

deed of trust (noun)	legal document (noun)
a written instrument legally conveying property to a trustee often used to secure an obligation such as a mortgage or promissory note	(law) a document that states some contractual relationship or grants some right