notification vs request

notification and request both are nouns.

Word	Noun	Adjective	Verb	Adverb
notification	Yes	No	No	No
request	Yes	No	Yes	No

As nouns, request is a hypernym of notification; that is, request is a word with a broader meaning than notification:

Other hypernyms of notification include asking.

notification (noun)	request (noun)
an accusation of crime made by a grand jury on its own initiative	the verbal act of requesting
informing by words	a formal message requesting something that is submitted to an authority
a request for payment

notification (verb)	request (verb)
	express the need or desire for
	ask (a person) to do something
	inquire for (information)