blimp vs airship

blimp and airship both are nouns.

Word	Noun	Adjective	Verb	Adverb
blimp	Yes	No	No	No
airship	Yes	No	No	No

As nouns, airship is a hypernym of blimp; that is, airship is a word with a broader meaning than blimp:

blimp: a small nonrigid airship used for observation or as a barrage balloon
airship: a steerable self-propelled aircraft

Other hypernyms of blimp include dirigible.

blimp (noun)	airship (noun)
a small nonrigid airship used for observation or as a barrage balloon	a steerable self-propelled aircraft