(n.) An oversounding, or a misuse, of the letter r; specifically (Phylol.), the tendency, exhibited in the Indo-European languages, to change s to r, as wese to were.

abandon abandonment abjection abomination abuse of terms acrostic adulteration alienation amphibologism amphiboly anagram antiphrasis atrocity bad bane barbarism bastardizing befouling befoulment biodegradability biodegradation blight brainwashing breakup bribery bribery and corruption bribing cacoepy cacology calembour carrion college of Laputa colloquialism contamination corrosion corruptedness corruptness counterindoctrination criminality crookedness crying evil cutting damage dandruff debasement decadence decadency decay decomposition defilement degeneracy degenerateness degeneration degradability degradation demoralization depravation depravedness depravity despoliation destruction detriment deviousness dilapidation dilution dishonesty dishonor disintegration disorganization dissoluteness dissolution doctoring envenoming equivocality equivoque evasiveness evil excrement false coloring feloniousness festering filth fortifying foul matter fouling fraudulence fraudulency furfur gammacism gangrene graft grievance harm havoc hurt ill improbity impropriety indirection indoctrination infection infelicity injury jeu de mots lacing lambdacism localism logogram logogriph malapropism mess metagram mildew mischief misconstruction misdirection misguidance misinformation misinstruction misinterpretation misknowledge misleading mispronunciation misrepresentation missaying misspeaking misteaching misusage misuse mold moral pollution moral turpitude muck mucus mystification mytacism obfuscation obscenity obscurantism obscuration ordure outrage oxidation oxidization palindrome paralambdacism pararhotacism paronomasia perversion play on words poison poisoning pollution profligacy prostitution pun punning pus putrid matter reindoctrination reprobacy resolution rhotacism rot rottenness rust scurf scuz shadiness shiftiness slang slanting slime slipperiness smut snot solecism sophistry sordes spiking spoilage spoonerism straining subornation subversion suppuration taboo word the worst torturing toxin trickiness turpitude unconscientiousness underhandedness ungrammaticism unsavoriness unscrupulousness unstraightforwardness venom vexation vitiation vulgarism watering woe wordplay wrong