turnip vs yellow turnip

turnip and yellow turnip both are nouns.

Word	Noun	Adjective	Verb	Adverb
turnip	Yes	No	No	No
yellow turnip	Yes	No	No	No

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

Other hyponyms of turnip include white turnip, rutabaga, swede, swedish turnip.

turnip (noun)	yellow turnip (noun)
root of any of several members of the mustard family	the large yellow root of a rutabaga plant used as food
widely cultivated plant having a large fleshy edible white or yellow root