antitrust law vs antitrust legislation

antitrust law and antitrust legislation both are nouns.

Word	Noun	Adjective	Verb	Adverb
antitrust law	Yes	No	No	No
antitrust legislation	Yes	No	No	No

As nouns, antitrust law and antitrust legislation are synonyms defined as:

antitrust law and antitrust legislation: law intended to promote free competition in the market place by outlawing monopolies

antitrust law (noun)	antitrust legislation (noun)
law intended to promote free competition in the market place by outlawing monopolies	law intended to promote free competition in the market place by outlawing monopolies