WordNet sense 1 (excessively unwilling to spend):

parsimonious, penurious

WordNet sense 2 ((used of persons or behavior) characterized by or indicative of lack of generosity):

mean, miserly, tight

WordNet sense 3 (petty or reluctant in giving or spending):

grudging, niggardly

WordNet sense 4 (unwilling to part with money):

closefisted

WordNet sense 5 (giving or spending with reluctance):

close, near, cheeseparing

WordNet sense 6 (embarrassingly stingy):

cheap

WordNet sense 7 (unwilling to spend):

ungenerous

WordNet sense 8 (deficient in amount or quality or extent):

meager, meagerly, meagre, scrimpy