labour party vs Labour

labour party and Labour both are nouns.

Word	Noun	Adjective	Verb	Adverb
labour party	Yes	No	No	No
Labour	Yes	No	No	No

As nouns, Labour is a hyponym of labour party; that is, Labour is a word with a more specific, narrower meaning than labour party:

labour party: a left-of-center political party formed to represent the interest of ordinary working people
Labour: a political party formed in Great Britain in 1900; characterized by the promotion of labor's interests and formerly the socialization of key industries

Other hyponyms of labour party include Australian Labor Party, British Labour Party, Labor, Labour Party.

labour party (noun)	Labour (noun)
a left-of-center political party formed to represent the interest of ordinary working people	a political party formed in Great Britain in 1900; characterized by the promotion of labor's interests and formerly the socialization of key industries