knock-on effect vs United Kingdom

knock-on effect and United Kingdom both are nouns.

Word	Noun	Adjective	Verb	Adverb
knock-on effect	Yes	No	No	No
United Kingdom	Yes	No	No	No

knock-on effect (noun)	United Kingdom (noun)
a secondary or incidental effect	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