preventive vs preventative

preventive and preventative both are nouns.

Word	Noun	Adjective	Verb	Adverb
preventive	Yes	Yes	No	No
preventative	Yes	Yes	No	No

As adjectives, preventive and preventative are synonyms defined as:

As adjectives, preventive and preventative are synonyms defined as:

preventive and preventative: preventing or contributing to the prevention of disease

Other synonyms of preventive include prophylactic.

As nouns, preventive and preventative are synonyms defined as:

preventive and preventative: remedy that prevents or slows the course of an illness or disease

Other synonyms of preventive include prophylactic.

As nouns, preventive and preventative are synonyms defined as:

preventive and preventative: an agent or device intended to prevent conception

As nouns, preventive and preventative are synonyms defined as:

preventive and preventative: any obstruction that impedes or is burdensome

Other synonyms of preventive include encumbrance, hinderance, hindrance, hitch, incumbrance, interference.

preventive (noun)	preventative (noun)
remedy that prevents or slows the course of an illness or disease	remedy that prevents or slows the course of an illness or disease
an agent or device intended to prevent conception	an agent or device intended to prevent conception
any obstruction that impedes or is burdensome	any obstruction that impedes or is burdensome

preventive (adjective)	preventative (adjective)
tending to prevent or hinder	tending to prevent or hinder
preventing or contributing to the prevention of disease	preventing or contributing to the prevention of disease