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