sphagnum vs sphagnum moss

sphagnum and sphagnum moss both are nouns.

Word	Noun	Adjective	Verb	Adverb
sphagnum	Yes	No	No	No
sphagnum moss	Yes	No	No	No

As nouns, sphagnum and sphagnum moss are synonyms defined as:

sphagnum and sphagnum moss: any of various pale or ashy mosses of the genus Sphagnum whose decomposed remains form peat

Other synonyms of sphagnum include bog moss, peat moss.

sphagnum (noun)	sphagnum moss (noun)
any of various pale or ashy mosses of the genus Sphagnum whose decomposed remains form peat	any of various pale or ashy mosses of the genus Sphagnum whose decomposed remains form peat