bubble vs bubbler

bubble and bubbler both are nouns.

Word	Noun	Adjective	Verb	Adverb
bubble	Yes	No	Yes	No
bubbler	Yes	No	No	No

bubble (noun)	bubbler (noun)
a dome-shaped covering made of transparent glass or plastic	a public fountain to provide a jet of drinking water
an impracticable and illusory idea	any of various devices in which air or some other gas is bubbled through a liquid
a speculative scheme that depends on unstable factors that the planner cannot control
a hollow globule of gas (e.g., air or carbon dioxide)

bubble (verb)	bubbler (verb)
expel gas from the stomach
form, produce, or emit bubbles
cause to form bubbles
rise in bubbles or as if in bubbles
flow in an irregular current with a bubbling noise