heap vs dysphemism

heap and dysphemism both are nouns.

Word	Noun	Adjective	Verb	Adverb
heap	Yes	No	Yes	No
dysphemism	Yes	No	No	No

As nouns, dysphemism is a hypernym of heap; that is, dysphemism is a word with a broader meaning than heap:

heap: a car that is old and unreliable
dysphemism: an offensive or disparaging expression that is substituted for an inoffensive one

Other hypernyms of heap include auto, automobile, car, machine, motorcar.

heap (noun)	dysphemism (noun)
a car that is old and unreliable	an offensive or disparaging expression that is substituted for an inoffensive one
a collection of objects laid on top of each other
(often followed by `of') a large number or amount or extent