loser vs unsuccessful person

loser and unsuccessful person both are nouns.

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

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

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

Other synonyms of loser include failure, nonstarter.

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