tzarina vs czarina

tzarina and czarina both are nouns.

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

As nouns, tzarina and czarina are synonyms defined as:

Other synonyms of tzarina include czaritza, tsarina, tsaritsa.

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