fag vs overfatigue

fag is a noun but overfatigue is not a noun.

Word	Noun	Adjective	Verb	Adverb
fag	Yes	No	Yes	No
overfatigue	No	No	Yes	No

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

Other hyponyms of fag include beat, exhaust, tucker, tucker out, wash up, overtire, overweary.

fag (noun)	overfatigue (noun)
finely ground tobacco wrapped in paper; for smoking
offensive term for a homosexual man

fag (verb)	overfatigue (verb)
exhaust or get tired through overuse or great strain or stress	tire excessively
work hard
act as a servant for older boys, in British public schools