all vs completely

all is an adjective but completely is not an adjective.

Word	Noun	Adjective	Verb	Adverb
all	No	Yes	No	Yes
completely	No	No	No	Yes

As adverbs, all and completely are synonyms defined as:

all and completely: to a complete degree or to the full or entire extent; Completely or entirely

Other synonyms of all include altogether, entirely, right, totally, whole, wholly.

all (adjective)	completely (adjective)
(quantifier) used with either mass or count nouns to indicate the whole number or amount of or every one of a class
completely given to or absorbed by

all (adverb)	completely (adverb)
to a complete degree or to the full or entire extent; Completely or entirely	so as to be complete; with everything necessary
	to a complete degree or to the full or entire extent; Completely or entirely