jalopy vs heap

jalopy and heap both are nouns.

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

As nouns, jalopy and heap are synonyms defined as:

Other synonyms of jalopy include bus.

jalopy (noun)	heap (noun)
a car that is old and unreliable	a car that is old and unreliable
	a collection of objects laid on top of each other
	(often followed by `of') a large number or amount or extent