matron vs wardress

matron and wardress both are nouns.

Word	Noun	Adjective	Verb	Adverb
matron	Yes	No	No	No
wardress	Yes	No	No	No

As nouns, wardress is a hypernym of matron; that is, wardress is a word with a broader meaning than matron:

matron (noun)	wardress (noun)
a married woman (usually middle-aged with children) who is staid and dignified	a woman warder
a woman in charge of nursing in a medical institution
a wardress in a prison