grass bacillus vs Bacillus subtilis

grass bacillus and Bacillus subtilis both are nouns.

Word	Noun	Adjective	Verb	Adverb
grass bacillus	Yes	No	No	No
Bacillus subtilis	Yes	No	No	No

As nouns, grass bacillus and Bacillus subtilis are synonyms defined as:

grass bacillus and Bacillus subtilis: a species of bacillus found in soil and decomposing organic matter; some strains produce antibiotics

Other synonyms of grass bacillus include Bacillus globigii, hay bacillus.

grass bacillus (noun)	Bacillus subtilis (noun)
a species of bacillus found in soil and decomposing organic matter; some strains produce antibiotics	a species of bacillus found in soil and decomposing organic matter; some strains produce antibiotics