dot matrix printer vs matrix printer

dot matrix printer and matrix printer both are nouns.

Word	Noun	Adjective	Verb	Adverb
dot matrix printer	Yes	No	No	No
matrix printer	Yes	No	No	No

As nouns, dot matrix printer and matrix printer are synonyms defined as:

dot matrix printer and matrix printer: a printer that represents each character as a pattern of dots from a dot matrix

Other synonyms of dot matrix printer include dot printer.

dot matrix printer (noun)	matrix printer (noun)
a printer that represents each character as a pattern of dots from a dot matrix	a printer that represents each character as a pattern of dots from a dot matrix