water pipe vs hubble-bubble

water pipe and hubble-bubble both are nouns.

Word	Noun	Adjective	Verb	Adverb
water pipe	Yes	No	No	No
hubble-bubble	Yes	No	No	No

As nouns, water pipe and hubble-bubble are synonyms defined as:

water pipe and hubble-bubble: an oriental tobacco pipe with a long flexible tube connected to a container where the smoke is cooled by passing through water

Other synonyms of water pipe include calean, chicha, hookah, hubbly-bubbly, kalian, narghile, nargileh, sheesha, shisha.

water pipe (noun)	hubble-bubble (noun)
an oriental tobacco pipe with a long flexible tube connected to a container where the smoke is cooled by passing through water	an oriental tobacco pipe with a long flexible tube connected to a container where the smoke is cooled by passing through water