lacrosse vs field game

lacrosse and field game both are nouns.

Word	Noun	Adjective	Verb	Adverb
lacrosse	Yes	No	No	No
field game	Yes	No	No	No

As nouns, field game is a hypernym of lacrosse; that is, field game is a word with a broader meaning than lacrosse:

lacrosse: a game invented by American Indians; now played by two teams who use long-handled rackets to catch and carry and throw the ball toward the opponents' goal
field game: an outdoor game played on a field of specified dimensions

lacrosse (noun)	field game (noun)
a game invented by American Indians; now played by two teams who use long-handled rackets to catch and carry and throw the ball toward the opponents' goal	an outdoor game played on a field of specified dimensions