igloo vs shanty

igloo and shanty both are nouns.

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

As nouns, shanty is a hypernym of igloo; that is, shanty is a word with a broader meaning than igloo:

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

Other hypernyms of igloo include hovel, hut, hutch, shack.

igloo (noun)	shanty (noun)
an Eskimo hut; usually built of blocks (of sod or snow) in the shape of a dome	small crude shelter used as a dwelling
	a rhythmical work song originally sung by sailors