heap vs slew

heap and slew both are nouns.

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

As nouns, heap and slew are synonyms defined as:

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

heap (noun)	slew (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

heap (verb)	slew (verb)
fill to overflow	turn sharply; change direction abruptly
arrange in stacks	move obliquely or sideways, usually in an uncontrolled manner
bestow in large quantities