grapnel anchor vs anchor

grapnel anchor and anchor both are nouns.

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

As nouns, anchor is a hypernym of grapnel anchor; that is, anchor is a word with a broader meaning than grapnel anchor:

Other hypernyms of grapnel anchor include ground tackle.

grapnel anchor (noun)	anchor (noun)
a light anchor for small boats	a mechanical device that prevents a vessel from moving
	a central cohesive source of support and stability
	a television reporter who coordinates a broadcast to which several correspondents contribute

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