invent vs manufacture

invent is not a noun while manufacture is a noun.

Word	Noun	Adjective	Verb	Adverb
invent	No	No	Yes	No
manufacture	Yes	No	Yes	No

As verbs, invent and manufacture are synonyms defined as:

Other synonyms of invent include cook up, fabricate, make up.

invent (noun)	manufacture (noun)
	the organized action of making of goods and services for sale
	the act of making something (a product) from raw materials

invent (verb)	manufacture (verb)
come up with (an idea, plan, explanation, theory, or principle) after a mental effort	put together out of artificial or natural components or parts
concoct something artificial or untrue	concoct something artificial or untrue
	create or produce in a mechanical way
	produce naturally