watercannon vs hosepipe

watercannon and hosepipe both are nouns.

Word	Noun	Adjective	Verb	Adverb
watercannon	Yes	No	No	No
hosepipe	Yes	No	No	No

As nouns, hosepipe is a hypernym of watercannon; that is, hosepipe is a word with a broader meaning than watercannon:

watercannon: a hose (carried on a truck) that fires water under high pressure to disperse crowds (especially crowds of rioters)
hosepipe: a flexible pipe for conveying a liquid or gas

Other hypernyms of watercannon include hose.

watercannon (noun)	hosepipe (noun)
a hose (carried on a truck) that fires water under high pressure to disperse crowds (especially crowds of rioters)	a flexible pipe for conveying a liquid or gas