Optioning rhymes with:
captioning, airconditioning, apportioning, auctioning, auditioning, captioning, cautioning, commissioning, conditioning, cushioning, decommissioning, fashioning, freshening, functioning, malfunctioning, mentioning, motioning, partitioning, petitioning, positioning, rationing, reconditioning, repositioning, sanctioning, sectioning, stationing, transitioning, vacationing
Optioning sounds like:
obedience, obtaining, obtains, obviating, optimize, opting, option's, options, options', ovations