handling vs manual labor

handling and manual labor both are nouns.

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

As nouns, manual labor is a hypernym of handling; that is, manual labor is a word with a broader meaning than handling:

handling: manual (or mechanical) carrying or moving or delivering or working with something
manual labor: labor done with the hands

Other hypernyms of handling include manual labour.

handling (noun)	manual labor (noun)
manual (or mechanical) carrying or moving or delivering or working with something	labor done with the hands
the action of touching with the hands (or the skillful use of the hands) or by the use of mechanical means
the management of someone or something