viceroy vs vicereine

viceroy and vicereine both are nouns.

Word	Noun	Adjective	Verb	Adverb
viceroy	Yes	No	No	No
vicereine	Yes	No	No	No

As nouns, viceroy and vicereine are synonyms defined as:

viceroy and vicereine: governor of a country or province who rules as the representative of his or her king or sovereign

viceroy (noun)	vicereine (noun)
showy American butterfly resembling the monarch but smaller	governor of a country or province who rules as the representative of his or her king or sovereign
governor of a country or province who rules as the representative of his or her king or sovereign	wife of a viceroy