live load vs superload

live load and superload both are nouns.

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

As nouns, live load and superload are synonyms defined as:

live load and superload: a variable load on a structure (e.g. a bridge) such as moving traffic

live load (noun)	superload (noun)
a variable load on a structure (e.g. a bridge) such as moving traffic	a variable load on a structure (e.g. a bridge) such as moving traffic