Niggardly rhymes with:
awkwardly, cowardly, dastardly, downwardly, good-naturedly, haphazardly, inwardly, naturedly, northwardly, outwardly, straightforwardly, upwardly
awkwardly, cowardly, dastardly, downwardly, good-naturedly, haphazardly, inwardly, naturedly, northwardly, outwardly, straightforwardly, upwardly