dysphemism vs jalopy

dysphemism and jalopy both are nouns.

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

As nouns, jalopy is a hyponym of dysphemism; that is, jalopy is a word with a more specific, narrower meaning than dysphemism:

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

Other hyponyms of dysphemism include bus, heap, old man.

dysphemism (noun)	jalopy (noun)
an offensive or disparaging expression that is substituted for an inoffensive one	a car that is old and unreliable