effervesce vs bubble

effervesce is not a noun while bubble is a noun.

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

As verbs, bubble is a hypernym of effervesce; that is, bubble is a word with a broader meaning than effervesce:

effervesce (noun)	bubble (noun)
	a dome-shaped covering made of transparent glass or plastic
	an impracticable and illusory idea
	a speculative scheme that depends on unstable factors that the planner cannot control
	a hollow globule of gas (e.g., air or carbon dioxide)

effervesce (verb)	bubble (verb)
become bubbly or frothy or foaming	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