WordNet (r) 3.0 (2006):

through and through
    adv 1: throughout the entire extent; "got soaked through in the
           rain"; "I'm frozen through"; "a letter shot through with
           the writer's personality"; "knew him through and
           through"; "boards rotten through and through" [syn:
           through, through and through]

Moby Thesaurus II by Grady Ward, 1.0:

69 Moby Thesaurus words for "through and through":
   absolute, ad infinitum, all over, all-embracing, all-encompassing,
   all-out, all-pervading, at all points, at full length, born,
   broad-based, clean, clear, comprehensive, congenital, consummate,
   deep-dyed, downright, dyed-in-the-wool, egregious, every bit,
   every inch, every whit, exhaustive, head and shoulders,
   heart and soul, in all respects, in every respect, in extenso,
   inside and out, intensive, neck deep, omnibus, omnipresent,
   on all counts, out-and-out, outright, overall, perfect, pervasive,
   plain, plumb, pure, radical, regular, root and branch, sheer,
   straight, sweeping, thorough, thoroughgoing, through-and-through,
   throughout, to the brim, to the death, to the end, to the hilt,
   total, ubiquitous, unconditional, universal, unmitigated,
   unqualified, unreserved, unrestricted, utter, veritable, wholesale,
   you name it