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