nonstarter vs unsuccessful person

nonstarter and unsuccessful person both are nouns.

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

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

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

Other synonyms of nonstarter include failure, loser.

nonstarter (noun)	unsuccessful person (noun)
a horse that fails to run in a race for which it has been entered	a person with a record of failing; someone who loses consistently
a person with a record of failing; someone who loses consistently