radish plant vs radish

radish plant and radish both are nouns.

Word	Noun	Adjective	Verb	Adverb
radish plant	Yes	No	No	No
radish	Yes	No	No	No

As nouns, radish plant and radish are synonyms defined as:

radish plant and radish: a cruciferous plant of the genus Raphanus having a pungent edible root

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

radish plant: a cruciferous plant of the genus Raphanus having a pungent edible root
radish: Eurasian plant widely cultivated for its edible pungent root usually eaten raw

Other hyponyms of radish plant include Raphanus sativus, daikon, Japanese radish, Raphanus sativus longipinnatus.

radish plant (noun)	radish (noun)
a cruciferous plant of the genus Raphanus having a pungent edible root	pungent fleshy edible root
	Eurasian plant widely cultivated for its edible pungent root usually eaten raw
	pungent edible root of any of various cultivated radish plants
	radish of Japan with a long hard durable root eaten raw or cooked
	a cruciferous plant of the genus Raphanus having a pungent edible root