Xi'an vs Hsian

Xi'an and Hsian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Xi'an	Yes	No	No	No
Hsian	Yes	No	No	No

As nouns, Xi'an and Hsian are synonyms defined as:

Xi'an and Hsian: a city of central China; capital of ancient Chinese empire 221-206 BC

Other synonyms of Xi'an include Changan, Sian, Singan, Xian.

Xi'an (noun)	Hsian (noun)
a city of central China; capital of ancient Chinese empire 221-206 BC	a city of central China; capital of ancient Chinese empire 221-206 BC