bubbler vs drinking fountain

bubbler and drinking fountain both are nouns.

Word	Noun	Adjective	Verb	Adverb
bubbler	Yes	No	No	No
drinking fountain	Yes	No	No	No

As nouns, bubbler and drinking fountain are synonyms defined as:

bubbler and drinking fountain: a public fountain to provide a jet of drinking water

Other synonyms of bubbler include water fountain.

bubbler (noun)	drinking fountain (noun)
a public fountain to provide a jet of drinking water	a public fountain to provide a jet of drinking water
any of various devices in which air or some other gas is bubbled through a liquid