loading vs dead load

loading and dead load both are nouns.

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

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

loading: weight to be borne or conveyed
dead load: a constant load on a structure (e.g. a bridge) due to the weight of the supported structure itself

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

loading (noun)	dead load (noun)
the labor of putting a load of something on or in a vehicle or ship or container etc.	a constant load on a structure (e.g. a bridge) due to the weight of the supported structure itself
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