boy vs Scout

boy and Scout both are nouns.

Word	Noun	Adjective	Verb	Adverb
boy	Yes	No	No	No
Scout	Yes	No	No	No

As nouns, Scout is a hyponym of boy; that is, Scout is a word with a more specific, narrower meaning than boy:

boy (noun)	Scout (noun)
a youthful male person	a Boy Scout or Girl Scout
(ethnic slur) offensive and disparaging term for Black man
a friendly informal reference to a grown man
a male human offspring