pressurize vs maintain

pressurize and maintain both are verbs.

Word	Noun	Adjective	Verb	Adverb
pressurize	No	No	Yes	No
maintain	No	No	Yes	No

As verbs, maintain is a hypernym of pressurize; that is, maintain is a word with a broader meaning than pressurize:

Other hypernyms of pressurize include hold, keep.

pressurize (verb)	maintain (verb)
increase the pressure in or of	stick to correctly or closely
maintain a certain pressure	state categorically
increase the pressure on a gas or liquid	state or assert
	support against an opponent
	maintain by writing regular records
	supply with necessities and support
	keep in safety and protect from harm, decay, loss, or destruction
	have and exercise
	maintain for use and service
	cause to continue in a certain state, position, or activity