sweet calamus vs calamus

sweet calamus and calamus both are nouns.

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

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

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

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

sweet calamus (noun)	calamus (noun)
perennial marsh plant having swordlike leaves and aromatic roots	the hollow spine of a feather
	any tropical Asian palm of the genus Calamus; light tough stems are a source of rattan canes
	perennial marsh plant having swordlike leaves and aromatic roots
	the aromatic root of the sweet flag used medicinally