goal vs finish line

goal and finish line both are nouns.

Word	Noun	Adjective	Verb	Adverb
goal	Yes	No	No	No
finish line	Yes	No	No	No

As nouns, finish line is a hyponym of goal; that is, finish line is a word with a more specific, narrower meaning than goal:

Other hyponyms of goal include finishing line.

goal (noun)	finish line (noun)
a successful attempt at scoring	a line indicating the location of the finish of a race
game equipment consisting of the place toward which players of a game try to advance a ball or puck in order to score points
the state of affairs that a plan is intended to achieve and that (when achieved) terminates behavior intended to achieve it
the place designated as the end (as of a race or journey)