spate vs great deal

spate and great deal both are nouns.

Word	Noun	Adjective	Verb	Adverb
spate	Yes	No	No	No
great deal	Yes	No	No	No

As nouns, spate and great deal are synonyms defined as:

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

spate (noun)	great deal (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