What is a ten letter word ending in s and the fifth letter is a s?

Answer 1

ancestress, allosaurus, antisepsis, averseness, backstairs, bakestress, barosaurus, berkshires, boyishness, brassiness, breastless, catastasis, cheesiness, chopsticks, christless, classiness, cloistress, clumsiness, coarseness, collosians, creaseless, crisscross, crossbones, crosshairs, crossroads, crosstrees, disastrous, downstairs, dressiness, drowsiness, elfishness, excuseless, flimsiness, garishness, glassiness, glassworks, glossiness, grassiness, grassroots, greasiness, hoarseness, hypostatis, illustrous, impishness, impostrous, infestuous, jackstones, jackstraws, lavishness, minostasis, modestness, obtuseness, overstress, phraseless, queasiness, resistless, robustless, seamstress, spareness, sparestess, spinstress, spouseless, themselves, transgress, treasonous, treasuress, treasuries, undesirous, uneasiness, unjustness, unwiseness, uppishness, xenosaurus.

i am sure there are many more which are not listed here.