research vs heraldry

research and heraldry both are nouns.

Word	Noun	Adjective	Verb	Adverb
research	Yes	No	Yes	No
heraldry	Yes	No	No	No

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

research: a search for knowledge
heraldry: the study and classification of armorial bearings and the tracing of genealogies

research (noun)	heraldry (noun)
systematic investigation to establish facts	emblem indicating the right of a person to bear arms
a search for knowledge	the study and classification of armorial bearings and the tracing of genealogies

research (verb)	heraldry (verb)
inquire into
attempt to find out in a systematically and scientific manner