cornsilk vs corn silk

cornsilk and corn silk both are nouns.

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

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

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

cornsilk (noun)	corn silk (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