Crossword clues for Nightmare cause 7 letters:BUGABOONightmare causeHOTMICSCauses of some P.R. nightmaresEERIECapable of causing nightmaresEERIECapable of causing nightmares, maybeSLEEPFRIGHTCause of nightmares?REMSLEEPCause of a nightmare?