sheath vs fingerstall

sheath and fingerstall both are nouns.

Word	Noun	Adjective	Verb	Adverb
sheath	Yes	No	No	No
fingerstall	Yes	No	No	No

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

Other hyponyms of sheath include aglet, aiglet, cot, holster, scabbard.

sheath (noun)	fingerstall (noun)
a protective covering (as for a knife or sword)	a sheath worn to protect a finger
a dress suitable for formal occasions
an enveloping structure or covering enclosing an animal or plant organ or part