Great Britain vs ticktack

Great Britain and ticktack both are nouns.

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

Great Britain (noun)	ticktack (noun)
an island comprising England and Scotland and Wales	system of signalling by hand signs used by bookmakers at racetracks
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

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