igloo vs iglu

igloo and iglu both are nouns.

Word	Noun	Adjective	Verb	Adverb
igloo	Yes	No	No	No
iglu	Yes	No	No	No

As nouns, igloo and iglu are synonyms defined as:

igloo and iglu: an Eskimo hut; usually built of blocks (of sod or snow) in the shape of a dome

igloo (noun)	iglu (noun)
an Eskimo hut; usually built of blocks (of sod or snow) in the shape of a dome	an Eskimo hut; usually built of blocks (of sod or snow) in the shape of a dome