bog moss vs sphagnum moss

bog moss and sphagnum moss both are nouns.

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

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

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

Other synonyms of bog moss include peat moss, sphagnum.

bog moss (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