well behaved vs well-behaved

well behaved and well-behaved both are adjectives.

Word	Noun	Adjective	Verb	Adverb
well behaved	No	Yes	No	No
well-behaved	No	Yes	No	No

As adjectives, well behaved and well-behaved are synonyms defined as:

well behaved and well-behaved: (usually of children) someone who behaves in a manner that the speaker believes is correct

well behaved (adjective)	well-behaved (adjective)
(usually of children) someone who behaves in a manner that the speaker believes is correct	(usually of children) someone who behaves in a manner that the speaker believes is correct