What does "caber" mean?

A long, thick log held upright at one end and tossed in the Highland games.

What is a synonym for "caber"?

Common synonyms include: log, timber, wood.

/ˈkeɪbɚ/ noun

noun ·Rare ·Advanced level

Noun

1
A long, thick log held upright at one end and tossed in the Highland games.
2
a heavy wooden pole (such as the trunk of a young fir) that is tossed as a test of strength (in the Highlands of northern Scotland) wordnet

From Scottish Gaelic cabar (“spar, pole”).