pearler vs pearl diver

pearler and pearl diver both are nouns.

Word	Noun	Adjective	Verb	Adverb
pearler	Yes	No	No	No
pearl diver	Yes	No	No	No

As nouns, pearler and pearl diver are synonyms defined as:

pearler and pearl diver: a diver who searches for molluscs containing pearls

pearler (noun)	pearl diver (noun)
a diver who searches for molluscs containing pearls	a diver who searches for molluscs containing pearls