wrist watch vs ticker

wrist watch and ticker both are nouns.

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

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

Other hypernyms of wrist watch include watch.

wrist watch (noun)	ticker (noun)
a watch that is worn strapped to the wrist	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