Autonomous rhymes with:
anonymous, synonymous, anonymous, magnanimous, pusillanimous, synonymous, unanimous, venomous, anonymous, artemus, blasphemous, clackamas, hippopotamus, infamous, magnanimous, monogamous, polygamous, pusillanimous, synonymous, thalamus, unanimous, venomous
Autonomous sounds like:
adam's, adamcik, adamczak, adamczyk, adamec, adamek, adames, adamik, adamkus, adamowicz, adams, adams', adams's, adamski, addams, adding, additions, admonish, admonishes, adonis, aetna's, aiding, atencio, athanas, athanassiou, athans, athenaios, athenians, athens, atienza, atomic, atoms, attaining, attains, attanasio, audience, audience's, audiences, auditing, auditioning, auditions, autonomic, autumn's, awaiting