obstetrician

acoustician, acquisition, admonition, aesthetician, air-condition, ammunition, apparition, apposition, coalition, co-edition, competition, composition, cosmetician, decommission, decondition, definition, demolition, deposition, dietitian, disposition, disquisition, electrician, erudition, exhibition, expedition, exposition, extradition, first edition, imposition, in addition, inanition, in commission, inhibition, inquisition, intermission, intromission, intuition, linguistician, logistician, malnutrition, malposition, manumission, mathematician, mechanician, micturition, on commission, opposition, Ordovician, parturition, politician, precognition, precondition, premonition, preposition, proposition, recognition, recondition, repetition, requisition, rescue mission, rhetorician, self-ignition, statistician, submunition, superstition, supposition, text edition, trade edition, transposition