Subtilty

CIDE DICTIONARY

Subtilty, n. [Contr. fr. subtility.].

•  The quality or state of being subtile; thinness; fineness; as, the subtility of air or light.  [1913 Webster]
•  Refinement; extreme acuteness; subtlety.  [1913 Webster]

  "Intelligible discourses are spoiled by too much subtility in nice divisions."  [1913 Webster]
•  Cunning; skill; craft.  [1913 Webster]

  "To learn a lewd man this subtility."  [1913 Webster]
•  Slyness in design; artifice; guile; a cunning design or artifice; a trick; subtlety.  [1913 Webster]

  " In senses 2, 3, and 4 the word is more commonly written subtlety."  [1913 Webster]

  "O full of all subtility and all mischief."  [1913 Webster]

ROGET THESAURUS

Subtilty

Rarity

N rarity, tenuity, absence of solidity, subtility, subtilty, subtlety, sponginess, compressibility, rarefaction, expansion, dilatation, inflation, subtilization, vaporization, evaporation, diffusion, gassification, ether, rare, subtile, thin, fine, tenuous, compressible, flimsy, slight, light, cavernous, spongy, rarefied, unsubstantial, uncompact, incompressed, rarefiable.