corn silk vs cornsilk

corn silk and cornsilk both are nouns.

Word	Noun	Adjective	Verb	Adverb
corn silk	Yes	No	No	No
cornsilk	Yes	No	No	No

As nouns, corn silk and cornsilk are synonyms defined as:

corn silk and cornsilk: each of the long filamentous styles that grow as a silky tuft at the tip of an ear of Indian corn

corn silk (noun)	cornsilk (noun)
each of the long filamentous styles that grow as a silky tuft at the tip of an ear of Indian corn	each of the long filamentous styles that grow as a silky tuft at the tip of an ear of Indian corn