befool vs slang

befool is not a noun while slang is a noun.

Word	Noun	Adjective	Verb	Adverb
befool	No	No	Yes	No
slang	Yes	No	Yes	No

As verbs, befool and slang are synonyms defined as:

Other synonyms of befool include cod, dupe, fool, gull, put on, put one across, put one over, take in.

befool (noun)	slang (noun)
	a characteristic language of a particular group (as among thieves)
	informal language consisting of words and expressions that are not considered appropriate for formal occasions; often vituperative or vulgar