bubble jet printer vs bubblejet

bubble jet printer and bubblejet both are nouns.

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

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

Other synonyms of bubble jet printer include bubble-jet printer.

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