raft vs great deal

raft and great deal both are nouns.

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

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

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

raft (noun)	great deal (noun)
a flat float (usually made of logs or planks) that can be used for transport or as a platform for swimmers	(often followed by `of') a large number or amount or extent
a foundation (usually on soft ground) consisting of an extended layer of reinforced concrete
(often followed by `of') a large number or amount or extent