Bacillus subtilis vs hay bacillus

Bacillus subtilis and hay bacillus both are nouns.

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

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

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

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

Bacillus subtilis (noun)	hay 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