stinking gladwyn vs gladdon

stinking gladwyn and gladdon both are nouns.

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

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

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

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

stinking gladwyn (noun)	gladdon (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