caliph vs khalifah

caliph and khalifah both are nouns.

Word	Noun	Adjective	Verb	Adverb
caliph	Yes	No	No	No
khalifah	Yes	No	No	No

As nouns, caliph and khalifah are synonyms defined as:

caliph and khalifah: the civil and religious leader of a Muslim state considered to be a representative of Allah on earth

Other synonyms of caliph include calif, kalif, kaliph, khalif.

caliph (noun)	khalifah (noun)
the civil and religious leader of a Muslim state considered to be a representative of Allah on earth	the civil and religious leader of a Muslim state considered to be a representative of Allah on earth