bubblejet vs ink-jet printer

bubblejet and ink-jet printer both are nouns.

Word	Noun	Adjective	Verb	Adverb
bubblejet	Yes	No	No	No
ink-jet printer	Yes	No	No	No

As nouns, ink-jet printer is a hypernym of bubblejet; that is, ink-jet printer is a word with a broader meaning than bubblejet:

bubblejet: a kind of ink-jet printer
ink-jet printer: a printer that produces characters by projecting electrically charged droplets of ink

bubblejet (noun)	ink-jet printer (noun)
a kind of ink-jet printer	a printer that produces characters by projecting electrically charged droplets of ink