schematic vs schematic drawing

schematic and schematic drawing both are nouns.

Word	Noun	Adjective	Verb	Adverb
schematic	Yes	Yes	No	No
schematic drawing	Yes	No	No	No

As nouns, schematic and schematic drawing are synonyms defined as:

schematic and schematic drawing: diagram of an electrical or mechanical system

schematic (noun)	schematic drawing (noun)
diagram of an electrical or mechanical system	diagram of an electrical or mechanical system

schematic (adjective)	schematic drawing (adjective)
represented in simplified or symbolic form