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
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)
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)