sausage balloon vs airship

sausage balloon and airship both are nouns.

Word	Noun	Adjective	Verb	Adverb
sausage balloon	Yes	No	No	No
airship	Yes	No	No	No

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

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

Other hypernyms of sausage balloon include dirigible.

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