whisker vs hairsbreadth

whisker and hairsbreadth both are nouns.

Word	Noun	Adjective	Verb	Adverb
whisker	Yes	No	Yes	No
hairsbreadth	Yes	No	No	No

As nouns, whisker and hairsbreadth are synonyms defined as:

Other synonyms of whisker include hair's-breadth, hair.

whisker (noun)	hairsbreadth (noun)
a long stiff hair growing from the snout or brow of most mammals as e.g. a cat	a very small distance or space
a very small distance or space

whisker (verb)	hairsbreadth (verb)
furnish with whiskers