negation, obligation, navigation, litigation, segregation, congregation, allegation, irrigation, propagation, subjugation, delegation, aggregation, conjugation, investigation, evacuation, interrogation, desegregation
unladen, occasion, abrasion, unshaven, unshaken, immigration, violation, integration, resignation, designation, fermentation, emigration, germination, conflagration, determination, annihilation, authorization, extermination, alienation, polarization, disintegration, pasteurization, vaporization, etiolation, colorization, misinterpretation, disorientation, reinterpretation, polymerization, mischaracterization