solid obtained solid of revolution solid one solid option solid or a liquid solid or hollow solid or liquid solid or liquid form solid or semi-solid solid orange solid organ solid organ transplantation solid organic solid organs solid oxide solid oxide fuel solid oxide fuel cell solid oxide fuel cells solid part solid particle solid particles solid particulate solid particulate material solid partner solid partnership solid parts solid performance solid perfume solid pharmaceutical solid pharmaceutical composition solid phase solid phase extraction solid phase material solid phase peptide solid phase support solid phase synthesis solid phases solid piece solid pieces solid plan solid plastic solid plate solid platform solid player solid policy solid polymer solid polymer electrolyte solid polymeric solid portion solid position solid potassium solid powder solid precipitate solid precipitated solid precipitates solid preparation solid preparations solid presence solid principles solid product solid products solid professional solid progress solid project solid proof solid propellant solid punch solid quality solid reason solid reasons solid recovered solid red solid relationship solid relationships solid reputation solid research solid residue solid residues solid resin solid results solid right solid rock solid rocket solid rocket boosters solid rocket motor solid rod solid round solid rubber solid sales solid salt solid sample solid samples solid science solid scientific solid season solid second solid security solid separated solid separation