loading vs superload

loading and superload both are nouns.

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

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

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

Other hyponyms of loading include burthen, dead load, live load, millstone, overburden, overload, overload.

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