unique vs alone

unique and alone both are adjectives.

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

As adjectives, unique and alone are synonyms defined as:

Other synonyms of unique include unequaled, unequalled, unparalleled.

unique (adjective)	alone (adjective)
radically distinctive and without equal	exclusive of anyone or anything else
the single one of its kind	radically distinctive and without equal
(followed by `to') applying exclusively to a given category or condition or locality	lacking companions or companionship
highly unusual or rare but not the single instance	isolated from others

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