gladdon vs stinking iris

gladdon and stinking iris both are nouns.

Word	Noun	Adjective	Verb	Adverb
gladdon	Yes	No	No	No
stinking iris	Yes	No	No	No

As nouns, gladdon and stinking iris are synonyms defined as:

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

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

gladdon (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