Gyrocompass rhymes with:
bumpus, campus, compas, compass, encompass, hippocampus, olympus, pompous, all-purpose, bippus, bumpus, campus, chapas, chiapas, compas, compass, coppess, copus, corpus, encompass, eohippus, hippocampus, hospice, kappus, lapis, lupus, malpass, manglapus, molpus, molpus', mopus, multipurpose, negropalpus, oedipus, olympus, opus, pappas, pompous, porpoise, prapas, precipice, purpose, tapas