grudging vs niggardly

grudging and niggardly both are adjectives.

Word	Noun	Adjective	Verb	Adverb
grudging	No	Yes	No	No
niggardly	No	Yes	No	No

As adjectives, grudging and niggardly are synonyms defined as:

Other synonyms of grudging include scrimy.

grudging (adjective)	niggardly (adjective)
petty or reluctant in giving or spending	petty or reluctant in giving or spending
of especially an attitude