repairman vs fixer

repairman and fixer both are nouns.

Word	Noun	Adjective	Verb	Adverb
repairman	Yes	No	No	No
fixer	Yes	No	No	No

As nouns, fixer is a hypernym of repairman; that is, fixer is a word with a broader meaning than repairman:

Other hypernyms of repairman include mender, repairer.

repairman (noun)	fixer (noun)
a skilled worker whose job is to repair things	synthetic narcotic drug similar to morphine but less habit-forming; used in narcotic detoxification and maintenance of heroin addiction
	someone who intervenes with authorities for a person in trouble (usually using underhand or illegal methods for a fee)
	a skilled worker who mends or repairs things
	a chemical compound that sets or fixes something (as a dye or a photographic image)