The Collaborative International Dictionary of English v.0.48:

Shoar \Shoar\ (sh[=o]r), n.
   A prop. See 3d Shore.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Shore \Shore\, n. [OE. schore; akin to LG. schore, D. schoor,
   OD. schoore, Icel. skor?a, and perhaps to E. shear, as being
   a piece cut off.]
   A prop, as a timber, placed as a brace or support against the
   side of a building or other structure; a prop placed beneath
   anything, as a beam, to prevent it from sinking or sagging.
   [Written also shoar.]
   [1913 Webster]