bubble vs emit

bubble is a noun but emit is not a noun.

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

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

Other hypernyms of bubble include breathe, pass off.

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

Other hypernyms of bubble include breathe, pass off.

bubble (noun)	emit (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)

bubble (verb)	emit (verb)
expel gas from the stomach	expel (gases or odors)
form, produce, or emit bubbles	express audibly; utter sounds (not necessarily words)
cause to form bubbles	give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.
rise in bubbles or as if in bubbles
flow in an irregular current with a bubbling noise