air pocket vs air hole

air pocket and air hole both are nouns.

Word	Noun	Adjective	Verb	Adverb
air pocket	Yes	No	No	No
air hole	Yes	No	No	No

As nouns, air pocket and air hole are synonyms defined as:

air pocket and air hole: a local region of low pressure or descending air that causes a plane to lose height suddenly

Other synonyms of air pocket include pocket.

air pocket (noun)	air hole (noun)
a local region of low pressure or descending air that causes a plane to lose height suddenly	a hole that allows the passage of air
	a local region of low pressure or descending air that causes a plane to lose height suddenly