fishgig vs leister

fishgig and leister both are nouns.

Word	Noun	Adjective	Verb	Adverb
fishgig	Yes	No	No	No
leister	Yes	No	No	No

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

fishgig: an implement with a shaft and barbed point used for catching fish
leister: a spear with three or more prongs; used for spearing fish (especially salmon)

Other hyponyms of fishgig include harpoon.

fishgig (noun)	leister (noun)
an implement with a shaft and barbed point used for catching fish	a spear with three or more prongs; used for spearing fish (especially salmon)