packing vs bundling

packing and bundling both are nouns.

Word	Noun	Adjective	Verb	Adverb
packing	Yes	No	No	No
bundling	Yes	No	No	No

As nouns, bundling is a hyponym of packing; that is, bundling is a word with a more specific, narrower meaning than packing:

packing (noun)	bundling (noun)
the enclosure of something in a package or box	the act of binding something into a bundle
carrying something in a pack on the back	the act of shoving hastily
any material used especially to protect something	a onetime custom during courtship of unmarried couples occupying the same bed without undressing