live load vs loading

live load and loading both are nouns.

Word	Noun	Adjective	Verb	Adverb
live load	Yes	No	No	No
loading	Yes	No	No	No

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

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

Other hypernyms of live load include burden, load.

live load (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