house sparrow vs sparrow

house sparrow and sparrow both are nouns.

Word	Noun	Adjective	Verb	Adverb
house sparrow	Yes	No	No	No
sparrow	Yes	No	No	No

As nouns, sparrow is a hypernym of house sparrow; that is, sparrow is a word with a broader meaning than house sparrow:

house sparrow: small hardy brown-and-grey bird native to Europe
sparrow: any of several small dull-colored singing birds feeding on seeds or insects

Other hypernyms of house sparrow include true sparrow.

house sparrow (noun)	sparrow (noun)
small hardy brown-and-grey bird native to Europe	any of several small dull-colored singing birds feeding on seeds or insects
	small brownish European songbird