everywhere vs all over

everywhere is not an adjective while all over is an adjective.

Word	Noun	Adjective	Verb	Adverb
everywhere	No	No	No	Yes
all over	No	Yes	No	Yes

As adverbs, everywhere and all over are synonyms defined as:

everywhere and all over: to or in any or all places; pronoun, location; quantifier: universal

Other synonyms of everywhere include everyplace.

everywhere (adjective)	all over (adjective)
	having come or been brought to a conclusion

everywhere (adverb)	all over (adverb)
to or in any or all places; pronoun, location; quantifier: universal	to or in any or all places; pronoun, location; quantifier: universal
	over the entire area