skinflint vs niggard

skinflint and niggard both are nouns.

Word	Noun	Adjective	Verb	Adverb
skinflint	Yes	No	No	No
niggard	Yes	No	No	No

As nouns, skinflint and niggard are synonyms defined as:

skinflint and niggard: a selfish person who is unwilling to give or spend

Other synonyms of skinflint include churl, scrooge.

skinflint (noun)	niggard (noun)
a selfish person who is unwilling to give or spend	a selfish person who is unwilling to give or spend