holiday vs vacation

holiday and vacation both are nouns.

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

As nouns, holiday and vacation are synonyms defined as:

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

As verbs, holiday and vacation are synonyms defined as:

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

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