WordNet records no synonym and no antonym for cribbage board. It is the only member of its synset, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
a board with pegs and regularly spaced holes for holding the pegs; used for keeping the score in a game of cribbage
Synonyms, antonyms and the broader and narrower relations for cribbage board come from Princeton University’s WordNet. Full sources and licences.