spate vs muckle

spate and muckle both are nouns.

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

As nouns, spate and muckle are synonyms defined as:

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

spate (noun)	muckle (noun)
the occurrence of a water flow resulting from sudden rain or melting snow	(often followed by `of') a large number or amount or extent
a sudden forceful flow
(often followed by `of') a large number or amount or extent