skinny vs bony

skinny is a noun but bony is not a noun.

Word	Noun	Adjective	Verb	Adverb
skinny	Yes	Yes	No	No
bony	No	Yes	No	No

As adjectives, skinny and bony are synonyms defined as:

Other synonyms of skinny include boney, scraggly, scraggy, scrawny, underweight, weedy.

skinny (noun)	bony (noun)
confidential information about a topic or person

skinny (adjective)	bony (adjective)
of or relating to or resembling skin	having bones especially many or prominent bones
giving or spending with reluctance	composed of or containing bone
being very thin	being very thin
fitting snugly