weary vs fatigue

weary is not a noun while fatigue is a noun.

Word	Noun	Adjective	Verb	Adverb
weary	No	Yes	Yes	No
fatigue	Yes	No	Yes	No

As verbs, weary and fatigue are synonyms defined as:

weary and fatigue: exhaust or get tired through overuse or great strain or stress

Other synonyms of weary include fag, fag out, jade, outwear, tire, tire out, wear, wear down, wear out, wear upon.

As verbs, weary and fatigue are synonyms defined as:

weary and fatigue: lose interest or become bored with something or somebody

Other synonyms of weary include jade, pall, tire.

weary (noun)	fatigue (noun)
	labor of a nonmilitary kind done by soldiers (cleaning or digging or draining or so on)
	(always used with a modifier) boredom resulting from overexposure to something
	temporary loss of strength and energy resulting from hard physical or mental work
	used of materials (especially metals) in a weakened state caused by long stress

weary (adjective)	fatigue (adjective)
physically and mentally fatigued

weary (verb)	fatigue (verb)
exhaust or get tired through overuse or great strain or stress	exhaust or get tired through overuse or great strain or stress
lose interest or become bored with something or somebody	lose interest or become bored with something or somebody