base on balls vs achievement

base on balls and achievement both are nouns.

Word	Noun	Adjective	Verb	Adverb
base on balls	Yes	No	No	No
achievement	Yes	No	No	No

As nouns, achievement is a hypernym of base on balls; that is, achievement is a word with a broader meaning than base on balls:

base on balls: (baseball) an advance to first base by a batter who receives four balls
achievement: the action of accomplishing something

Other hypernyms of base on balls include accomplishment.

base on balls (noun)	achievement (noun)
(baseball) an advance to first base by a batter who receives four balls	the action of accomplishing something