fellow vs escort

fellow and escort both are nouns.

Word	Noun	Adjective	Verb	Adverb
fellow	Yes	No	No	No
escort	Yes	No	Yes	No

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

Other hyponyms of fellow include date, playfellow, playmate, tovarich, tovarisch.

fellow (noun)	escort (noun)
a boy or man	the act of accompanying someone or something in order to protect them
a man who is the lover of a man or woman	a participant in a date
a friend who is frequently in the company of another	someone who escorts and protects a prominent person
a person who is member of one's class or profession	an attendant who is employed to accompany someone
an informal form of address for a man
a member of a learned society
one of a pair

fellow (verb)	escort (verb)
	accompany as an escort
	conduct someone someplace