Here's what rhymes with onaction.
faction inaction reaction fraction traction impaction interaction attraction compaction exaction infraction redaction transaction contraction diffraction refraction retraction benefaction counteraction detraction overreaction protraction malefaction abstraction extraction distraction subtraction rarefaction stupefaction satisfaction liquefaction petrifaction vitrifaction putrefaction dissatisfaction Words that almost rhyme with onaction
maxim taxon waxen flaxen klaxon mansion fashion passion sanction ration caption lation madmen tation mammon madden happen imagine captain hadn barren cabin cannon canon famine wagon chaplain gallon salmon baron canyon fasten satin bastion canton falcon haben saffron blacken bracken dampen fatten hangman jasmine latin slacken adaption banyan batten sadden scansion talon gammon badman badmen taxman gasman taxmen abandon compassion dragon assassin plankton prolactin stallion flatten medallion plantain capstan chanson flagon gladden handgun platen batsman refashion unfasten scallion damson trashcan flashgun raglan sandmen expansion companion grandson battalion clansmen contraption dispassion landsman clansman triathlon pentathlon bandsman gyrfalcon refasten craftsman draftsman draughtsman zooplankton draftsmen diapason gravamen phytoplankton reexamine upperclassman rapscallion underclassman