charcoal vs writing implement

charcoal and writing implement both are nouns.

Word	Noun	Adjective	Verb	Adverb
charcoal	Yes	Yes	Yes	No
writing implement	Yes	No	No	No

As nouns, writing implement is a hypernym of charcoal; that is, writing implement is a word with a broader meaning than charcoal:

charcoal (noun)	writing implement (noun)
a stick of black carbon material used for drawing	an implement that is used to write
a drawing made with a stick of black carbon material
a very dark grey color
a carbonaceous material obtained by heating wood or other organic matter in the absence of air

charcoal (adjective)	writing implement (adjective)
of a very dark grey

charcoal (verb)	writing implement (verb)
draw, trace, or represent with charcoal