hovel vs igloo

hovel and igloo both are nouns.

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

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

hovel: 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 hovel include iglu, mudhif.

hovel (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