triggerfish vs oldwench

triggerfish and oldwench both are nouns.

Word	Noun	Adjective	Verb	Adverb
triggerfish	Yes	No	No	No
oldwench	Yes	No	No	No

As nouns, oldwench is a hyponym of triggerfish; that is, oldwench is a word with a more specific, narrower meaning than triggerfish:

triggerfish: any of numerous compressed deep-bodied tropical fishes with sandpapery skin and erectile spines in the first dorsal fin
oldwench: tropical Atlantic fish

Other hyponyms of triggerfish include Balistes vetula, Bessy cerca, oldwife, queen triggerfish.

triggerfish (noun)	oldwench (noun)
any of numerous compressed deep-bodied tropical fishes with sandpapery skin and erectile spines in the first dorsal fin	tropical Atlantic fish