Bacillus subtilis vs grass bacillus

Bacillus subtilis and grass bacillus both are nouns.

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

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

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

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

Bacillus subtilis (noun)	grass bacillus (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