czarina vs tzarina

czarina and tzarina both are nouns.

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

As nouns, czarina and tzarina are synonyms defined as:

Other synonyms of czarina include czaritza, tsarina, tsaritsa.

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