orris vs orrisroot

orris and orrisroot both are nouns.

Word	Noun	Adjective	Verb	Adverb
orris	Yes	No	No	No
orrisroot	Yes	No	No	No

As nouns, orris and orrisroot are synonyms defined as:

orris and orrisroot: fragrant rootstock of various irises especially Florentine iris; used in perfumes and medicines

orris (noun)	orrisroot (noun)
German iris having large white flowers with lavender-tinged falls and a fragrant rhizome	fragrant rootstock of various irises especially Florentine iris; used in perfumes and medicines
fragrant rootstock of various irises especially Florentine iris; used in perfumes and medicines