manual labor vs wiring

manual labor and wiring both are nouns.

Word	Noun	Adjective	Verb	Adverb
manual labor	Yes	No	No	No
wiring	Yes	No	No	No

As nouns, wiring is a hyponym of manual labor; that is, wiring is a word with a more specific, narrower meaning than manual labor:

Other hyponyms of manual labor include application, coating, covering, bodywork, handling, picking, planking.

manual labor (noun)	wiring (noun)
labor done with the hands	the work of installing the wires for an electrical system or device
	a circuit of wires for the distribution of electricity