penny-pinching vs skinny

penny-pinching and skinny both are nouns.

Word	Noun	Adjective	Verb	Adverb
penny-pinching	Yes	Yes	No	No
skinny	Yes	Yes	No	No

As adjectives, penny-pinching and skinny are synonyms defined as:

Other synonyms of penny-pinching include cheeseparing, close, near.

penny-pinching (noun)	skinny (noun)
extreme care in spending money; reluctance to spend money unnecessarily	confidential information about a topic or person

penny-pinching (adjective)	skinny (adjective)
giving or spending with reluctance	of or relating to or resembling skin
	giving or spending with reluctance
	being very thin
	fitting snugly