superload vs loading

superload and loading both are nouns.

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

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

superload: a variable load on a structure (e.g. a bridge) such as moving traffic
loading: weight to be borne or conveyed

Other hypernyms of superload include burden, load.

superload (noun)	loading (noun)
a variable load on a structure (e.g. a bridge) such as moving traffic	the labor of putting a load of something on or in a vehicle or ship or container etc.
	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