Concoction rhymes with:
auction, abduction, abstraction, action, addiction, advection, affection, affliction, attraction, auction, benediction, circumspection, classaction, collection, complexion, compunction, conduction, confection, conjunction, connection, constriction, construction, contraction, contradiction, convection, conviction, correction, crucifixion, deconstruction, deduction, defection, depiction, dereliction, destruction, detection, diction, diffraction, direction, disaffection, disconnection, disinfection, dissatisfaction, dissection, distinction, distraction, dysfunction, ejection, election, erection, eviction, exaction, extinction, extraction, faction, fiction, flexion, fraction, friction, function, imperfection, inaction, induction, infarction, infection, inflection, infliction, infraction, injection, injunction, inspection, instruction, insurrection, interaction, interconnection, interdiction, interjection, intersection, introduction, introspection, junction, jurisdiction, liposuction, liquefaction, malfunction, midsection, nonfiction, objection, obstruction, overproduction, overprotection, overreaction, perfection, prediction, predilection, preelection, production, projection, protection, reaction, recollection, reconstruction, redirection, reduction, reelection, reflection, reinspection, reintroduction, rejection, reproduction, restriction, resurrection, retraction, sanction, satisfaction, section, seduction, selection, subsection, subtraction, suction, telaction, traction, transaction, transection
Concoction sounds like:
canonization, communication, communization, congdon, congestion, coniston, conjugation, connaughton, connection, considine, constitution, cummington, cunnington