agglomerate vs heap

agglomerate and heap both are nouns.

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

As nouns, agglomerate and heap are synonyms defined as:

Other synonyms of agglomerate include cumulation, cumulus, mound, pile.

agglomerate (noun)	heap (noun)
a collection of objects laid on top of each other	a car that is old and unreliable
volcanic rock consisting of large fragments fused together	a collection of objects laid on top of each other
	(often followed by `of') a large number or amount or extent

agglomerate (adjective)	heap (adjective)
clustered together but not coherent