Concocting rhymes with:
abducting, acting, addicting, affecting, afflicting, attracting, collecting, conducting, conflicting, connecting, constricting, constructing, contacting, contracting, contradicting, convicting, correcting, counteracting, deducting, defecting, deflecting, depicting, destructing, detecting, detracting, directing, disconnecting, disrespecting, dissecting, distracting, effecting, ejecting, electing, enacting, erecting, evicting, exacting, expecting, extracting, impacting, infecting, inflicting, injecting, inspecting, instructing, interacting, interdicting, intersecting, neglecting, objecting, obstructing, overreacting, perfecting, predicting, projecting, prospecting, protecting, reacting, recollecting, reconnecting, reconstructing, redacting, redirecting, redistricting, reelecting, reflecting, rejecting, respecting, restricting, resurrecting, retracting, schlichting, selecting, subcontracting, subjecting, subtracting, superconducting, suspecting, unsuspecting
Concocting sounds like:
coincidence, coincidences, coinciding, communicating, communication's, communications, communications', conceding, concoctions, conjugations, connecting, connections, consistence, consistency, consisting, constance, constancy, constituencies, constituency, constituting, constitution's, constitutions