roast beef plant vs stinking iris

roast beef plant and stinking iris both are nouns.

Word	Noun	Adjective	Verb	Adverb
roast beef plant	Yes	No	No	No
stinking iris	Yes	No	No	No

As nouns, roast beef plant and stinking iris are synonyms defined as:

roast beef plant and stinking iris: iris with purple flowers and foul-smelling leaves; southern and western Europe and North Africa

Other synonyms of roast beef plant include gladdon, gladdon iris, Iris foetidissima, stinking gladwyn.

roast beef plant (noun)	stinking iris (noun)
iris with purple flowers and foul-smelling leaves; southern and western Europe and North Africa	iris with purple flowers and foul-smelling leaves; southern and western Europe and North Africa