hard to please vs hard-to-please

hard to please and hard-to-please both are adjectives.

Word	Noun	Adjective	Verb	Adverb
hard to please	No	Yes	No	No
hard-to-please	No	Yes	No	No

As adjectives, hard to please and hard-to-please are synonyms defined as:

hard to please (adjective)	hard-to-please (adjective)
(of persons) fussy and demanding	(of persons) fussy and demanding