unsuccessful person vs loser

unsuccessful person and loser both are nouns.

Word	Noun	Adjective	Verb	Adverb
unsuccessful person	Yes	No	No	No
loser	Yes	No	No	No

As nouns, unsuccessful person and loser are synonyms defined as:

unsuccessful person and loser: a person with a record of failing; someone who loses consistently

Other synonyms of unsuccessful person include failure, nonstarter.

unsuccessful person (noun)	loser (noun)
a person with a record of failing; someone who loses consistently	a gambler who loses a bet
	a contestant who loses the contest
	a person with a record of failing; someone who loses consistently