bowler vs derby

bowler and derby both are nouns.

Word	Noun	Adjective	Verb	Adverb
bowler	Yes	No	No	No
derby	Yes	No	No	No

As nouns, bowler and derby are synonyms defined as:

Other synonyms of bowler include bowler hat, derby hat, plug hat.

bowler (noun)	derby (noun)
a felt hat that is round and hard with a narrow brim	a felt hat that is round and hard with a narrow brim
a player who rolls balls down an alley at pins
a cricketer who delivers the ball to the batsman in cricket