bubble vs globule

bubble and globule both are nouns.

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

As nouns, globule is a hypernym of bubble; that is, globule is a word with a broader meaning than bubble:

bubble (noun)	globule (noun)
a dome-shaped covering made of transparent glass or plastic	a small globe or ball
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)	globule (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