line drawing vs delineation

line drawing and delineation both are nouns.

Word	Noun	Adjective	Verb	Adverb
line drawing	Yes	No	No	No
delineation	Yes	No	No	No

As nouns, line drawing and delineation are synonyms defined as:

line drawing and delineation: a drawing of the outlines of forms or objects

Other synonyms of line drawing include depiction, limning.

line drawing (noun)	delineation (noun)
a drawing of the outlines of forms or objects	representation by drawing or painting etc
	a drawing of the outlines of forms or objects
	a graphic or vivid verbal description