whisker

(noun) a very small distance or space. Synonyms: hair's-breadth, hairsbreadth, hair. Examples: "They escaped by a hair's-breadth." "They lost the election by a whisker."

(noun) a long stiff hair growing from the snout or brow of most mammals as e.g. a cat. Synonyms: vibrissa, sensory hair.

(verb) furnish with whiskers. Synonyms: bewhisker. Examples: "A whiskered jersey."