Authors' rhymes with:
author's, authors, arthur's, arthurs, author's, authors, coauthors, crowther's, crowthers, ethers, fathers', mothers', panther's, panthers, panthers', walthers
Authors' sounds like:
address, addressee, addresses, adheres, adorees, adores, atari's, ataturk, ataturk's, atrocious, auditor's, auditors, auditors', audric, audris, author's, authorize, authorizes, authors