Obvious rhymes with:
devious, envious, hovious, impervious, lascivious, oblivious, octavius, previous, vesuvius, vitruvius
Obvious sounds like:
obese, obeys, obsequious, obsess, obsesses, obuchowski, ofc, off's, office, office's, offices, officio, offs, ohbayashi, oops, op's, opaque, opax, opec, opec's, opic, opic's, oppose, opposes, ops, opus, ovex