bubble vs pass off

bubble is a noun but pass off is not a noun.

Word	Noun	Adjective	Verb	Adverb
bubble	Yes	No	Yes	No
pass off	No	No	Yes	No

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

Other hypernyms of bubble include breathe, emit.

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

Other hypernyms of bubble include breathe, emit.

bubble (noun)	pass off (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)	pass off (verb)
expel gas from the stomach	expel (gases or odors)
form, produce, or emit bubbles	come to pass
cause to form bubbles	disappear gradually
rise in bubbles or as if in bubbles	disregard
flow in an irregular current with a bubbling noise	cause to be circulated and accepted in a false character or identity
	be accepted as something or somebody in a false character or identity