speed bump vs preventative

speed bump and preventative both are nouns.

Word	Noun	Adjective	Verb	Adverb
speed bump	Yes	No	No	No
preventative	Yes	Yes	No	No

As nouns, preventative is a hypernym of speed bump; that is, preventative is a word with a broader meaning than speed bump:

speed bump: a hindrance to speeding created by a crosswise ridge in the surface of a roadway
preventative: any obstruction that impedes or is burdensome

Other hypernyms of speed bump include encumbrance, hinderance, hindrance, hitch, incumbrance, interference, preventive.

speed bump (noun)	preventative (noun)
a hindrance to speeding created by a crosswise ridge in the surface of a roadway	remedy that prevents or slows the course of an illness or disease
	an agent or device intended to prevent conception
	any obstruction that impedes or is burdensome

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