overburden vs loading

overburden and loading both are nouns.

Word	Noun	Adjective	Verb	Adverb
overburden	Yes	No	Yes	No
loading	Yes	No	No	No

As nouns, loading is a hypernym of overburden; that is, loading is a word with a broader meaning than overburden:

Other hypernyms of overburden include burden, load.

overburden (noun)	loading (noun)
an excessive burden	the labor of putting a load of something on or in a vehicle or ship or container etc.
the surface soil that must be moved away to get at coal seams and mineral deposits	goods carried by a large vehicle
	weight to be borne or conveyed
	a quantity that can be processed or transported at one time
	the ratio of the gross weight of an airplane to some factor determining its lift

overburden (verb)	loading (verb)
burden with too much work or responsibility
load with excessive weight