ticker vs wrist watch

ticker and wrist watch both are nouns.

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

As nouns, wrist watch is a hyponym of ticker; that is, wrist watch is a word with a more specific, narrower meaning than ticker:

ticker (noun)	wrist watch (noun)
a character printer that automatically prints stock quotations on ticker tape	a watch that is worn strapped to the wrist
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