dim vs darken

dim is an adjective but darken is not an adjective.

Word	Noun	Adjective	Verb	Adverb
dim	No	Yes	Yes	No
darken	No	No	Yes	No

As verbs, darken is a hypernym of dim; that is, darken is a word with a broader meaning than dim:

As verbs, darken is a hypernym of dim; that is, darken is a word with a broader meaning than dim:

dim (adjective)	darken (adjective)
made dim or less bright
lacking in light; not bright or harsh
offering little or no hope
lacking clarity or distinctness
slow to learn or understand; lacking intellectual acuity

dim (verb)	darken (verb)
make dim or lusterless	become dark or darker
become dim or lusterless	make dark or darker
make dim by comparison or conceal	tarnish or stain
become vague or indistinct
switch (a car's headlights) from a higher to a lower beam