Acorus calamus vs sweet calamus

Acorus calamus and sweet calamus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Acorus calamus	Yes	No	No	No
sweet calamus	Yes	No	No	No

As nouns, Acorus calamus and sweet calamus are synonyms defined as:

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

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

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