different between lambskin vs shearling

English

lamb +? skin

lambskin (countable and uncountable, plural lambskins)

The skin of a very young sheep, especially prepared with the fleece still attached. A very fine form of leather.
A kind of woollen cloth resembling this.

From Middle English scherling; equivalent to shear +? -ling.

shearling (plural shearlings)

A sheep that has been shorn for the first time
(chiefly US) A sheepskin or lambskin that has gone through a limited shearing process so that the fibers are of uniform depth
Her coat was lined with shearling.

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