mistrace

SNIPPER 7x7 NONHOME EIDOLIC ESERINE ZONATED EMETINE RESECTS DOGGERELS 9x5 OVERVALUE MINIATURE INUNDATED CEASELESS ATHEROMA 8x6 THOLEPIN AERATING MISTRACE ANTEATER NEEDLERS NEWFANGLED 10x4 EXHILARATE EPIDEMICAL MOROSENESS ATHEROMA 8x6 THOLEPIN AERATING MISTRACE ANTEATER NEEDLESS METATHETICAL 12x3 AMELIORATIVE GENTLENESSES FEVERISH 8x6 ITERANCE BESOTTED BRIDLING ENCEINTE DEADNESS UNMETABOLIZED 13x2 NEURAMINIDASE The 7x7 answers the question posed in the introduction, as it is the (unique!) double square or rectangle having the largest area (49).