it ends with a or
A spectator
observer
a treasurer!
to inspect or to watch carefully
The possessive form is the boy's watches, or the boy's two watches.
The main purpose of watch is to check the time so we can say watches are time checking machines but nowadays watches are more than a time machine they are use as a fashion and jewellery.
A person who watches a game is a spectator.
A "Spectator" or "Fan"
when someone inspects or watches the drugs that go through the world. Cops crackdown on drugs watches
observer
a babysitter
a treasurer!
someone who watches wildlife
Everyone that is someone
spectators
A "spectator".
watchmaker.
a peeping tom