throwaway vs ad

throwaway and ad both are nouns.

Word	Noun	Adjective	Verb	Adverb
throwaway	Yes	Yes	No	No
ad	Yes	No	No	No

As nouns, ad is a hypernym of throwaway; that is, ad is a word with a broader meaning than throwaway:

throwaway: an advertisement (usually printed on a page or in a leaflet) intended for wide distribution
ad: a public promotion of some product or service

Other hypernyms of throwaway include advert, advertisement, advertising, advertizement, advertizing.

throwaway (noun)	ad (noun)
an advertisement (usually printed on a page or in a leaflet) intended for wide distribution	a public promotion of some product or service
words spoken in a casual way with conscious under-emphasis
(sometimes offensive) a homeless boy who has been abandoned and roams the streets

throwaway (adjective)	ad (adjective)
intended to be thrown away after use
thrown away