single annual single answer single antenna single apartment single app single appearance single applicant single application single arch single area single argument single arm single arrow single article single artist single artwork single aspect single assembly single asset single atom single atoms single attack single attempt single audit single author single authorisation single authority single available single award single axis single axle single baby single bacterial single bacterium single bad single bag single ball single ballot single band single bank single bar single barrel single base single base pair single batch single battery single battery charge single battle single beam single bearing single bed single bedroom single bedrooms single beds single beep single bell single belt single best single best thing single best way single big single biggest single biggest problem single bill single bird single birth single birthday single bit single bitcoin single bite single black single blade single blank single blast single blind single block single blog single blood single bloody single blow single blue single board single board computer single boat single body single bolus single bomb single bond single bonds single bone single book single bottle single bowl single box single brain single branch single brand single break single breasted