wristband vs watchband

wristband and watchband both are nouns.

Word	Noun	Adjective	Verb	Adverb
wristband	Yes	No	No	No
watchband	Yes	No	No	No

As nouns, wristband and watchband are synonyms defined as:

wristband and watchband: a band of cloth or leather or metal links attached to a wristwatch and wrapped around the wrist

Other synonyms of wristband include bracelet, watch bracelet, watchstrap.

wristband (noun)	watchband (noun)
band consisting of a part of a sleeve that covers the wrist	a band of cloth or leather or metal links attached to a wristwatch and wrapped around the wrist
a band of cloth or leather or metal links attached to a wristwatch and wrapped around the wrist