Obviously rhymes with:
enviously, previously, contemporaneously, curiously, enviously, erroneously, extraneously, furiously, gloriously, harmoniously, hideously, hilariously, indubiously, instantaneously, laboriously, mysteriously, notoriously, precariously, previously, seriously, simultaneously, spontaneously, studiously, tediously, unceremoniously, variously, vicariously
Obviously sounds like:
official, officially, opsahl, opsal