alone vs unequalled

alone and unequalled both are adjectives.

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

As adjectives, alone and unequalled are synonyms defined as:

Other synonyms of alone include unequaled, unique, unparalleled.

alone (adjective)	unequalled (adjective)
exclusive of anyone or anything else	radically distinctive and without equal
radically distinctive and without equal
lacking companions or companionship
isolated from others

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