drafting vs mechanical drawing

drafting and mechanical drawing both are nouns.

Word	Noun	Adjective	Verb	Adverb
drafting	Yes	No	No	No
mechanical drawing	Yes	No	No	No

As nouns, drafting and mechanical drawing are synonyms defined as:

drafting (noun)	mechanical drawing (noun)
the creation of artistic pictures or diagrams	the craft of drawing blueprints
writing a first version to be filled out and polished later	scale drawing of a machine or architectural plan etc
the craft of drawing blueprints