reality check vs occasion

reality check and occasion both are nouns.

Word	Noun	Adjective	Verb	Adverb
reality check	Yes	No	No	No
occasion	Yes	No	Yes	No

As nouns, occasion is a hypernym of reality check; that is, occasion is a word with a broader meaning than reality check:

reality check: an occasion on which one is reminded of the nature of things in the real world
occasion: an event that occurs at a critical time

Other hypernyms of reality check include juncture.

reality check (noun)	occasion (noun)
an occasion on which one is reminded of the nature of things in the real world	an event that occurs at a critical time
	a formal or official social gathering or ceremony of people
	a rational motive for a belief or action
	an opportunity to do something
	the time of a particular event

reality check (verb)	occasion (verb)
	give occasion to