muckle vs heap

muckle and heap both are nouns.

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

As nouns, muckle and heap are synonyms defined as:

muckle and heap: (often followed by `of') a large number or amount or extent

muckle (noun)	heap (noun)
(often followed by `of') a large number or amount or extent	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