haji vs hajji

haji and hajji both are nouns.

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

As nouns, haji and hajji are synonyms defined as:

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

Other synonyms of haji include hadji.

haji (noun)	hajji (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
	a general term used by foreign soldiers to refer to the Iraqi people