grass bacillus vs hay bacillus

grass bacillus and hay bacillus both are nouns.

Word	Noun	Adjective	Verb	Adverb
grass bacillus	Yes	No	No	No
hay bacillus	Yes	No	No	No

As nouns, grass bacillus and hay bacillus are synonyms defined as:

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

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

grass bacillus (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