raid vs air raid

raid and air raid both are nouns.

Word	Noun	Adjective	Verb	Adverb
raid	Yes	No	Yes	No
air raid	Yes	No	No	No

As nouns, air raid is a hyponym of raid; that is, air raid is a word with a more specific, narrower meaning than raid:

Other hyponyms of raid include air attack, swoop.

raid (noun)	air raid (noun)
a sudden short attack	an attack by armed planes on a surface target
an attempt by speculators to defraud investors

raid (verb)	air raid (verb)
search for something needed or desired
enter someone else's territory and take spoils
take over (a company) by buying a controlling interest of its stock
search without warning, make a sudden surprise attack on