hadji vs haji

hadji and haji both are nouns.

Word	Noun	Adjective	Verb	Adverb
hadji	Yes	No	No	No
haji	Yes	No	No	No

As nouns, hadji and haji are synonyms defined as:

hadji and haji: an Arabic term of respect for someone who has made the pilgrimage to Mecca

Other synonyms of hadji include hajji.

hadji (noun)	haji (noun)
an Arabic term of respect for someone who has made the pilgrimage to Mecca	an Arabic term of respect for someone who has made the pilgrimage to Mecca