ticktack vs Great Britain

ticktack and Great Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
ticktack	Yes	No	Yes	No
Great Britain	Yes	No	No	No

ticktack (noun)	Great Britain (noun)
system of signalling by hand signs used by bookmakers at racetracks	an island comprising England and Scotland and Wales
	a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom

ticktack (verb)	Great Britain (verb)
make a sound like a clock or a timer