No definitions found for 'tough as leather'
Perhaps one of these:
toxicology,
toxicologist,
thesicle,
texas longhorn,
tachyglossus,
texas league single,
tissue culture,
tuskegee, al,
tiki island, tx,
two-cycle,
tisical,
tachyglossa,
thigh-slapper,
tussah silk,
toxicologic,
toxicological,
tussicular,
toxicologically,
texas leaguer,
toxical,
tachyglossidae,
to couch a lance,
toxoglossa,
the social evil,
tiki island,
tusseh silk,
to wash gold