heap vs raft

heap and raft both are nouns.

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

As nouns, heap and raft are synonyms defined as:

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

heap (noun)	raft (noun)
a car that is old and unreliable	a flat float (usually made of logs or planks) that can be used for transport or as a platform for swimmers
a collection of objects laid on top of each other	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	(often followed by `of') a large number or amount or extent