tzarina vs tsarina

tzarina and tsarina both are nouns.

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

As nouns, tzarina and tsarina are synonyms defined as:

Other synonyms of tzarina include czarina, czaritza, tsaritsa.

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