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