lineament vs forehead

lineament and forehead both are nouns.

Word	Noun	Adjective	Verb	Adverb
lineament	Yes	No	No	No
forehead	Yes	No	No	No

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

lineament: the characteristic parts of a person's face: eyes and nose and mouth and chin
forehead: the part of the face above the eyes

Other hyponyms of lineament include chin, mentum, brow, temple, cheek, jowl, jaw.

lineament (noun)	forehead (noun)
the characteristic parts of a person's face: eyes and nose and mouth and chin	the part of the face above the eyes
a characteristic property that defines the apparent individual nature of something	the large cranial bone forming the front part of the cranium: includes the upper part of the orbits