sleep((a) rest in a state of natural unconsciousness • It is bad for you to have too little sleep, since it makes you tired; I had only four hours' sleep last night); dream(thoughts and pictures in the mind that come mostly during sleep • I had a terrible dream last night); slumber(sleep • She was in a deep slumber; I didn't want to disturb your slumbers); repose; rest(sleep • He needs a good night's rest); dormition; phantasma; sleeping; a night's repose; big Z's(The big Z's must set in before I could finish the movie. Сон одолел меня до того как я закончил смотреть кино. Interex); doss down; doss; beddy-bye; bye-bye; dream world; dreaming; drowsiness
vision(During the night he saw a vision in which Thoth appeared to him and told him to go next morning to the library of the temple.google.ruI. Havkin)
nightdream(т. к. dream означает и "сон", и "мечта", то появилось слово daydream – дневной dream (мечта, днём мы не спим) и nightdream – ночной dream (сон, ведь ночью как раз спим) • You have black nightdreams, I know, for I have sat by you as you slept and heard you talk and seen your terror, which would soon destroy you if you could recall it, as one night showed.wiktionary.orgShabe)