perigonium vs chlamys

perigonium and chlamys both are nouns.

Word	Noun	Adjective	Verb	Adverb
perigonium	Yes	No	No	No
chlamys	Yes	No	No	No

As nouns, perigonium and chlamys are synonyms defined as:

perigonium and chlamys: collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils

Other synonyms of perigonium include floral envelope, perianth, perigone.

perigonium (noun)	chlamys (noun)
collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils	a short mantle or cape fastened at the shoulder; worn by men in ancient Greece
	collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils