sphagnum moss vs bog moss

sphagnum moss and bog moss both are nouns.

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

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

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

Other synonyms of sphagnum moss include peat moss, sphagnum.

sphagnum moss (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