gladdon iris vs roast beef plant

gladdon iris and roast beef plant both are nouns.

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

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

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

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

gladdon iris (noun)	roast beef plant (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