hut vs igloo

hut and igloo both are nouns.

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

As nouns, igloo is a hyponym of hut; that is, igloo is a word with a more specific, narrower meaning than hut:

hut: small crude shelter used as a dwelling
igloo: an Eskimo hut; usually built of blocks (of sod or snow) in the shape of a dome

Other hyponyms of hut include iglu, mudhif.

hut (noun)	igloo (noun)
small crude shelter used as a dwelling	an Eskimo hut; usually built of blocks (of sod or snow) in the shape of a dome
temporary military shelter