sphagnum vs bog moss

sphagnum and bog moss both are nouns.

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

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

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

Other synonyms of sphagnum include peat moss, sphagnum moss.

sphagnum (noun)	bog 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