marchioness vs wife

marchioness and wife both are nouns.

Word	Noun	Adjective	Verb	Adverb
marchioness	Yes	No	No	No
wife	Yes	No	No	No

As nouns, wife is a hypernym of marchioness; that is, wife is a word with a broader meaning than marchioness:

Other hypernyms of marchioness include married woman.

marchioness (noun)	wife (noun)
a noblewoman ranking below a duchess and above a countess	a married woman; a man's partner in marriage
the wife or widow of a marquis