Texas leaguer vs fly ball

Texas leaguer and fly ball both are nouns.

Word	Noun	Adjective	Verb	Adverb
Texas leaguer	Yes	No	No	No
fly ball	Yes	No	No	No

As nouns, fly ball is a hypernym of Texas leaguer; that is, fly ball is a word with a broader meaning than Texas leaguer:

Texas leaguer: (baseball) a fly ball that falls between and infielder and an outfielder
fly ball: (baseball) a hit that flies up in the air

Other hypernyms of Texas leaguer include fly.

Texas leaguer (noun)	fly ball (noun)
(baseball) a fly ball that falls between and infielder and an outfielder	(baseball) a hit that flies up in the air