Acorus calamus vs myrtle flag

Acorus calamus and myrtle flag both are nouns.

Word	Noun	Adjective	Verb	Adverb
Acorus calamus	Yes	No	No	No
myrtle flag	Yes	No	No	No

As nouns, Acorus calamus and myrtle flag are synonyms defined as:

Acorus calamus and myrtle flag: perennial marsh plant having swordlike leaves and aromatic roots

Other synonyms of Acorus calamus include calamus, flagroot, sweet calamus, sweet flag.

Acorus calamus (noun)	myrtle flag (noun)
perennial marsh plant having swordlike leaves and aromatic roots	perennial marsh plant having swordlike leaves and aromatic roots