sort vs pigeonhole

sort and pigeonhole both are nouns.

Word	Noun	Adjective	Verb	Adverb
sort	Yes	No	Yes	No
pigeonhole	Yes	No	Yes	No

As verbs, pigeonhole is a hyponym of sort; that is, pigeonhole is a word with a more specific, narrower meaning than sort:

sort (noun)	pigeonhole (noun)
an approximate definition or example	a small compartment
a category of things distinguished by some common characteristic or quality	a specific (often simplistic) category
a person of a particular character or nature
an operation that segregates items into groups according to a specified criterion

sort (verb)	pigeonhole (verb)
arrange or order by classes or categories	treat or classify according to a mental stereotype
examine in order to test suitability	place into a small compartment