drinking fountain vs bubbler

drinking fountain and bubbler both are nouns.

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

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

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

Other synonyms of drinking fountain include water fountain.

drinking fountain (noun)	bubbler (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