anchor vs grapnel

anchor and grapnel both are nouns.

Word	Noun	Adjective	Verb	Adverb
anchor	Yes	No	Yes	No
grapnel	Yes	No	No	No

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

Other hyponyms of anchor include grapnel anchor, mooring anchor, mushroom anchor, sheet anchor, waist anchor.

anchor (noun)	grapnel (noun)
a mechanical device that prevents a vessel from moving	a light anchor for small boats
a central cohesive source of support and stability	a tool consisting of several hooks for grasping and holding; often thrown with a rope
a television reporter who coordinates a broadcast to which several correspondents contribute

anchor (verb)	grapnel (verb)
secure a vessel with an anchor
fix firmly and stably