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