ticker vs character printer

ticker and character printer both are nouns.

Word	Noun	Adjective	Verb	Adverb
ticker	Yes	No	No	No
character printer	Yes	No	No	No

As nouns, character printer is a hypernym of ticker; that is, character printer is a word with a broader meaning than ticker:

ticker: a character printer that automatically prints stock quotations on ticker tape
character printer: a printer that prints a single character at a time

Other hypernyms of ticker include character-at-a-time printer, serial printer.

ticker (noun)	character printer (noun)
a character printer that automatically prints stock quotations on ticker tape	a printer that prints a single character at a time
a small portable timepiece
the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body