Word Study
sparable
CIDE DICTIONARY
sparable, n. [Corrupted from sparrow bill.].
A kind of small nail used by shoemakers. [1913 Webster]
OXFORD DICTIONARY
sparable, n. a headless nail used for the soles and heels of shoes.
Etymology
contr. of sparrow-bill, also used in this sense
For further exploring for "sparable" in Webster Dictionary Online