SEMI , QUAVER proofreader , proofread , er corroborate , corroborate PERSPICACIOUS , PERSPICACIOUS semihydrate , semi , hydrate STOOPWORK , STOOP , WORK EXTRAERYTHROCYTIC , EXTRA , ERYTHROCYTIC HETEROCOMPLEX , HETERO , COMPLEX erythrogram , erythro , gram preverbal , pre , verb , al BOULDER , BOULDER favouring , favouring inion , inion SECESSIONARY , SECESSION , ARY slogan , slogan SUPERPREMIUM , SUPER , PREMIUM SWELLDOM , SWELL , DOM gate - keep , gate - keep OBTRIANGULAR , OB , TRIANGULAR REENGRAFT , RE , EN , GRAFT choirboyish , choirboy , ish NESTLET , NEST , LET bass violist , bass viol , ist nanodeformable , nano , de , form , able glass , glass Perryville , Perry , ville