tzarina vs tsaritsa

tzarina and tsaritsa both are nouns.

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

As nouns, tzarina and tsaritsa are synonyms defined as:

Other synonyms of tzarina include czarina, czaritza, tsarina.

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