single user single value single valve single vampire single variable single variety single vector single vehicle single vendor single verse single version single vertical single vessel single victim single victory single video single view single village single vineyard single virtual single virus single vision single visit single visitor single voice single volume single vote single wall single walled single war single was released single watch single water single wave single wavelength single way single weapon single web single website single week single weekend single weight single wheel single white single white female single whole single wicket single wide single width single will single win single wind single window single window system single windows single wing single winner single wire single witness single woman single woman who single women single women who single wooden single word single word he said single word i single word you single word you say single words single work single worker single working single world single worst single written single yarn single year single yellow single you single young single zero single zone single-a single-acting single-aisle single-arm single-axis single-board single-breasted single-car single-cell single-cell organisms single-celled single-celled organism single-celled organisms single-chain single-chain antibodies single-chain antibody