claims adjuster vs investigator

claims adjuster and investigator both are nouns.

Word	Noun	Adjective	Verb	Adverb
claims adjuster	Yes	No	No	No
investigator	Yes	No	No	No

As nouns, investigator is a hypernym of claims adjuster; that is, investigator is a word with a broader meaning than claims adjuster:

claims adjuster: one who investigates insurance claims or claims for damages and recommends an effective settlement
investigator: someone who investigates

claims adjuster (noun)	investigator (noun)
one who investigates insurance claims or claims for damages and recommends an effective settlement	someone who investigates
	a scientist who devotes himself to doing research
	a police officer who investigates crimes