bactericidal vs disinfectant

bactericidal is not a noun while disinfectant is a noun.

Word	Noun	Adjective	Verb	Adverb
bactericidal	No	Yes	No	No
disinfectant	Yes	Yes	No	No

As adjectives, bactericidal and disinfectant are synonyms defined as:

bactericidal and disinfectant: preventing infection by inhibiting the growth or action of microorganisms

Other synonyms of bactericidal include germicidal.

bactericidal (noun)	disinfectant (noun)
	an agent (as heat or radiation or a chemical) that destroys microorganisms that might carry disease

bactericidal (adjective)	disinfectant (adjective)
preventing infection by inhibiting the growth or action of microorganisms	preventing infection by inhibiting the growth or action of microorganisms