alone vs unaccompanied

alone and unaccompanied both are adjectives.

Word	Noun	Adjective	Verb	Adverb
alone	No	Yes	No	Yes
unaccompanied	No	Yes	No	Yes

As adverbs, alone and unaccompanied are synonyms defined as:

Other synonyms of alone include solo.

alone (adjective)	unaccompanied (adjective)
exclusive of anyone or anything else	being without an escort
radically distinctive and without equal	playing or singing without accompaniment
lacking companions or companionship	(of a state or an event) taking place without something specified occurring at the same time
isolated from others

alone (adverb)	unaccompanied (adverb)
without any others being included or involved	without anybody else or anything else
without anybody else or anything else