pocket watch vs ticker

pocket watch and ticker both are nouns.

Word	Noun	Adjective	Verb	Adverb
pocket watch	Yes	No	No	No
ticker	Yes	No	No	No

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

Other hypernyms of pocket watch include watch.

pocket watch (noun)	ticker (noun)
a watch that is carried in a small watch pocket	a character printer that automatically prints stock quotations on ticker tape
	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