superpower vs world power

superpower and world power both are nouns.

Word	Noun	Adjective	Verb	Adverb
superpower	Yes	No	No	No
world power	Yes	No	No	No

As nouns, superpower and world power are synonyms defined as:

superpower and world power: a state powerful enough to influence events throughout the world

Other synonyms of superpower include great power, major power, power.

superpower (noun)	world power (noun)
a state powerful enough to influence events throughout the world	a state powerful enough to influence events throughout the world