odd fish vs actor

odd fish and actor both are nouns.

Word	Noun	Adjective	Verb	Adverb
odd fish	Yes	No	No	No
actor	Yes	No	No	No

As nouns, actor is a hypernym of odd fish; that is, actor is a word with a broader meaning than odd fish:

odd fish: someone regarded as eccentric or crazy and standing out from a group
actor: a person who acts and gets things done

Other hypernyms of odd fish include doer, worker.

odd fish (noun)	actor (noun)
someone regarded as eccentric or crazy and standing out from a group	a theatrical performer
	a person who acts and gets things done