bubble-jet printer vs bubble jet printer

bubble-jet printer and bubble jet printer both are nouns.

Word	Noun	Adjective	Verb	Adverb
bubble-jet printer	Yes	No	No	No
bubble jet printer	Yes	No	No	No

As nouns, bubble-jet printer and bubble jet printer are synonyms defined as:

Other synonyms of bubble-jet printer include bubblejet.

bubble-jet printer (noun)	bubble jet printer (noun)
a kind of ink-jet printer	a kind of ink-jet printer