timer vs chronograph

timer and chronograph both are nouns.

Word	Noun	Adjective	Verb	Adverb
timer	Yes	No	No	No
chronograph	Yes	No	No	No

As nouns, chronograph is a hyponym of timer; that is, chronograph is a word with a more specific, narrower meaning than timer:

Other hyponyms of timer include parking meter, stop watch, stopwatch.

timer (noun)	chronograph (noun)
a timepiece that measures a time interval and signals its end	an accurate timer for recording time
a regulator that activates or deactivates a mechanism at set times
(sports) an official who keeps track of the time elapsed