czarina vs tsarina

czarina and tsarina both are nouns.

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

As nouns, czarina and tsarina are synonyms defined as:

Other synonyms of czarina include czaritza, tsaritsa, tzarina.

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