no-show vs guest

no-show and guest both are nouns.

Word	Noun	Adjective	Verb	Adverb
no-show	Yes	No	No	No
guest	Yes	No	No	No

As nouns, guest is a hypernym of no-show; that is, guest is a word with a broader meaning than no-show:

no-show: a guest who fails to notify a hotel or restaurant when canceling a reservation
guest: a customer of a hotel or restaurant etc.

no-show (noun)	guest (noun)
someone who shirks duty	(computer science) any computer that is hooked up to a computer network
a guest who fails to notify a hotel or restaurant when canceling a reservation	a visitor to whom hospitality is extended
	a customer of a hotel or restaurant etc.