pressurise vs alter

pressurise and alter both are verbs.

Word	Noun	Adjective	Verb	Adverb
pressurise	No	No	Yes	No
alter	No	No	Yes	No

As verbs, alter is a hypernym of pressurise; that is, alter is a word with a broader meaning than pressurise:

Other hypernyms of pressurise include change, modify.

pressurise (verb)	alter (verb)
increase the pressure in or of	remove the ovaries of
maintain a certain pressure	become different in some particular way, without permanently losing one's or its former characteristics or essence
increase the pressure on a gas or liquid	cause to change; make different; cause a transformation
	insert words into texts, often falsifying it thereby
	make an alteration to