tsarina vs tsaritsa

tsarina and tsaritsa both are nouns.

Word	Noun	Adjective	Verb	Adverb
tsarina	Yes	No	No	No
tsaritsa	Yes	No	No	No

As nouns, tsarina and tsaritsa are synonyms defined as:

Other synonyms of tsarina include czarina, czaritza, tzarina.

tsarina (noun)	tsaritsa (noun)
the wife or widow of a czar	the wife or widow of a czar