haji vs hadji

haji and hadji both are nouns.

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

As nouns, haji and hadji are synonyms defined as:

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

Other synonyms of haji include hajji.

haji (noun)	hadji (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