germ warfare vs bacteriological warfare

germ warfare and bacteriological warfare both are nouns.

Word	Noun	Adjective	Verb	Adverb
germ warfare	Yes	No	No	No
bacteriological warfare	Yes	No	No	No

As nouns, germ warfare and bacteriological warfare are synonyms defined as:

germ warfare and bacteriological warfare: the use of harmful bacteria as a weapon

germ warfare (noun)	bacteriological warfare (noun)
the use of harmful bacteria as a weapon	the use of harmful bacteria as a weapon