洗濯・せんたく　 Here are two good online dictionaries, for future reference → http://www.alc.co.jp/index.html http://www.csse.monash.edu.au/~jwb/cgi-bin/wwwjdic.cgi?1C

You can say it by just "katakanizing" the english word: ランドリー(randorii) http://www.nc-nomura.com/laundry/img/l_top0.jpg In Japan there are coin randoriis everywhere.（⌒▽⌒） But if you are talking about dirty clothes, maybe is better to use 洗濯物(sentakumono).