Here's what rhymes with needlessly.
heedlessly Words that almost rhyme with needlessly
speechlessly sleeplessly ceaselessly zealously seamlessly needfully easily equally evenly eafily evilly heedfully legally speedily peacefully greedily grievously peaceably uneasily unequally unevenly reapply regally feasibly speciously cheekily sneakily wheezily anemically recently deity secrecy decency illegally decently fealty ingeniously regency aridity dreamily gleefully ideality realty serenely facetiously genially naivety piquancy sleepily drearily egregiously peony breezily phonemically covetously greasily piquantly creakily creepily queasily coequally creamily sleazily frequency frequently obesity agreeably appreciably conceivably indecency leniency unspeakably benignity leniently indecently obscenely believably conceitedly inappreciably squeakily infrequently supremely unfrequently coherently unbelievably infrequency deceitfully irredeemably congenially dubiety indefeasibly unrelievedly conveniently irretrievably inconceivably heterogeneously disagreeably centripetally homogeneity spontaneity historicity inconveniently heterogeneity crystallinity simultaneity contemporaneity