heap vs mickle

heap and mickle both are nouns.

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

As nouns, heap and mickle are synonyms defined as:

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

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