御休みなさい[oyasuminasai] good night
ひと休み[hitoyasumi] rest
運休[unkyuu] service suspended (e.g. trains)
夏季休暇[kakikyuuka] summer vacation
夏休み[natsuyasumi] summer vacation

閑話休題[kanwakyuudai] Now let's return to the main subject
休め[yasume] (Stand) at ease!
気休め[kiyasume] mere consolation
気休めに[kiyasumeni] for peace of mind
休する[kyuusuru] to come to an end

安眠[anmin] quiet sleep
一眠[ichimin] the first sleep (of silkworms)
ひと眠り[hitonemuri] (usu. in positive sentences) (a) sleep
永眠[eimin] eternal sleep
夏眠[kamin] estivation

快眠[kaimin] pleasant sleep
休眠[kyuumin] idle
休眠期[kyuuminki] dormant season
居眠り[inemuri] dozing
催眠[saimin] hypnotism