洗濯【せんたく】
washing, laundry, relaxing, taking a break
洗剤【せんざい】
detergent, cleanser, cleaning agent, washing material
洗濯機【せんたくき】
washing machine, (clothes) washer
洗う【あらう】
to wash, to cleanse, to rinse, to inquire into, to investigate, to purify (one's heart), to lave (e.g. shore), to wash over (e.g. deck), to sweep
水洗【すいせん】
washing with water, rinsing, flushing
手洗い【てあらい】
washing one's hands, water (or basin, etc.) for washing one's hands, restroom, lavatory, toilet, hand-washing (laundry, etc.)
洗面【せんめん】
washing one's face
洗面所【せんめんじょ】
washroom, bathroom
皿洗い【さらあらい】
washing-up, dish-washing
洗髪【せんぱつ】
washing one's hair, having a shampoo
洗練【せんれん】
polish, refinement
洗面器【せんめんき】
wash basin, wash bowl (incl. portable bowl in a public bath)
洗脳【せんのう】
brainwashing
洗い物【あらいもの】
things to be washed (esp. dishes and laundry)