face vs light

face and light both are nouns.

Word	Noun	Adjective	Verb	Adverb
face	Yes	No	Yes	No
light	Yes	Yes	Yes	Yes

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

face: the feelings expressed on a person's face
light: merriment expressed by a brightness or gleam or animation of countenance

Other hyponyms of face include leer, spark, sparkle, twinkle, gloominess.

face (noun)	light (noun)
a vertical surface of a building or cliff	any device serving as a source of illumination
the side upon which the use of a thing depends (usually the most prominent surface of an object)	a device for lighting or igniting fuel or charges or fires
the striking or working surface of an implement	the visual effect of illumination on objects or scenes as created in pictures
the general outward appearance of something	the quality of being luminous; emitting or reflecting light
status in the eyes of others	merriment expressed by a brightness or gleam or animation of countenance
impudent aggressiveness	mental understanding as an enlightening experience
the feelings expressed on a person's face	a particular perspective or aspect of a situation
the front of the human head from the forehead to the chin and ear to ear	public awareness
the part of an animal corresponding to the human face	a visual warning signal
a specific size and style of type within a type family	an illuminated area
a contorted facial expression	a person regarded very fondly
a surface forming part of the outside of an object	(physics) electromagnetic radiation that can produce a visual sensation
a part of a person that is used to refer to a person	having abundant light or illumination
	a condition of spiritual awareness; divine illumination

face (adjective)	light (adjective)
	of comparatively little physical weight or density
	psychologically light; especially free from sadness or troubles
	not great in degree or quantity or number
	of the military or industry; using (or being) relatively small or light arms or equipment
	(used of color) having a relatively small amount of coloring agent
	characterized by or emitting light
	(physics, chemistry) not having atomic weight greater than average
	of little intensity or power or force
	easily assimilated in the alimentary canal; not rich or heavily seasoned
	silly or trivial
	weak and likely to lose consciousness
	having little importance
	less than the correct or legal or full amount often deliberately so
	designed for ease of movement or to carry little weight
	moving easily and quickly; nimble
	(used of soil) loose and large-grained in consistency
	having relatively few calories
	(of sound or color) free from anything that dulls or dims
	(of sleep) easily disturbed
	marked by temperance in indulgence
	very thin and insubstantial
	casual and unrestrained in sexual behavior
	demanding little effort; not burdensome
	(used of vowels or syllables) pronounced with little or no stress
	intended primarily as entertainment; not serious or profound

face (verb)	light (verb)
deal with (something unpleasant) head on	introduce light into
present somebody with something, usually to accuse or criticize	start or maintain a fire in
oppose, as in hostility or a competition	begin to smoke
line the edge (of a garment) with a different material	to come to rest, settle
cover the front or surface of	alight from (a horse)
turn so as to face; turn the face in a certain direction	fall to somebody by assignment or lot; passed
turn so as to expose the face	cause to start burning; subject to fire or great heat
be oriented in a certain direction, often with respect to another reference point; be opposite to
be opposite

face (adverb)	light (adverb)
	with few burdens