thinness
1 antonym for thinness — opposites grouped by meaning.
Noun — The quality of being thin.
Antonyms
Etymology
Came into English from Middle English thynnesse, which developed from Old English þynnes (“thinness, slightness of density, lack of density, tenuity, fluidity, poverty, feebleness of sight, weakness”); equivalent to thin + -ness.
Full origin of thinness →