Cautioned rhymes with:
aforementioned, airconditioned, apportioned, auctioned, auditioned, captioned, commissioned, conditioned, contentioned, cushioned, decommissioned, fashioned, freshened, functioned, impassioned, malfunctioned, mentioned, motioned, oldfashioned, optioned, partitioned, petitioned, positioned, proportioned, propositioned, rationed, reconditioned, repositioned, requisitioned, sanctioned, sectioned, stationed, unsanctioned, vacationed
Cautioned sounds like:
cadenhead, castaneda, catamount, chastened, chestnut, chestnutt, costumed, cottoned, cottonmouth, cottonwood, coutant