Small Void in a Piece of Wood
This page is the CodyCross answer for the clue below from Home Sweet Home, Group 621, Puzzle 4 (Welcome Mat).
Question is: Small Void in a Piece of Wood
and the answer is: KNOTHOLE
Word Meaning:
KNOTHOLE — In a piece of lumber, a void left by a knot in the wood; such holes are often convenient for peering through when they occur in fences.
Definitions from Wiktionary.