nonattender vs no-show

nonattender and no-show both are nouns.

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

As nouns, nonattender and no-show are synonyms defined as:

Other synonyms of nonattender include truant.

nonattender (noun)	no-show (noun)
someone who shirks duty	someone who shirks duty
	a guest who fails to notify a hotel or restaurant when canceling a reservation