Preventative
Part of speech: noun
Definition: Preventive (in all senses).
Part of speech: adjective
Definition: Preventive (in all senses).
Prophylactic
Part of speech: adjective
Definition: Serving to prevent or protect against an undesired effect, especially disease.
Part of speech: noun
Definition: A medicine which preserves or defends against disease; a preventive.Specifically, a prophylactic condom.