vacation vs holiday

vacation and holiday both are nouns.

Word	Noun	Adjective	Verb	Adverb
vacation	Yes	No	Yes	No
holiday	Yes	No	Yes	No

As nouns, vacation and holiday are synonyms defined as:

vacation and holiday: leisure time away from work devoted to rest or pleasure

As verbs, vacation and holiday are synonyms defined as:

vacation (noun)	holiday (noun)
the act of making something legally void	leisure time away from work devoted to rest or pleasure
leisure time away from work devoted to rest or pleasure	a day on which work is suspended by law or custom

vacation (verb)	holiday (verb)
spend or take a vacation	spend or take a vacation