water pipe vs kalian

water pipe and kalian both are nouns.

Word	Noun	Adjective	Verb	Adverb
water pipe	Yes	No	No	No
kalian	Yes	No	No	No

As nouns, water pipe and kalian are synonyms defined as:

water pipe and kalian: 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, hubble-bubble, hubbly-bubbly, narghile, nargileh, sheesha, shisha.

water pipe (noun)	kalian (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