solid shaft solid shampoo solid shape solid sheet solid shell solid shot solid silicone solid silver solid snake solid so solid social solid sodium solid sodium bicarbonate solid sodium carbonate solid solution solid solution strengthening solid solutions solid sound solid source solid south solid stainless solid start solid starting solid state solid state drive solid state drives solid state physics solid state polymerization solid state relay solid steel solid stone solid story solid strategy solid structure solid structures solid substance solid substances solid substrate solid substrates solid support solid supports solid surface solid surfaces solid system solid team solid technical solid theoretical solid thing solid timber solid tire solid tires solid titanium solid top solid track record solid training solid tumor solid tumors solid tumours solid understanding solid unit solid urban solid wall solid walls solid was dissolved solid was dried solid washed solid waste solid waste collection solid waste disposal solid waste incineration solid waste management solid waste treatment solid wastes solid water solid week solid weight solid white solid wire solid wood solid wood flooring solid wood furniture solid wooden solid year solid years solid yellow solid-fuel solid-liquid solid-liquid separation solid-liquid separator solid-phase solid-phase synthesis solid-propellant solid-state solid-state batteries solid-state drive solid-state drives solid-state laser solid-state physics solid-state storage