khan vs ruler

khan and ruler both are nouns.

Word	Noun	Adjective	Verb	Adverb
khan	Yes	No	No	No
ruler	Yes	No	No	No

As nouns, ruler is a hypernym of khan; that is, ruler is a word with a broader meaning than khan:

Other hypernyms of khan include swayer.

khan (noun)	ruler (noun)
an inn in some eastern countries with a large courtyard that provides accommodation for caravans	measuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths
a title given to rulers or other important people in Asian countries	a person who rules or commands