invent vs create mentally

invent and create mentally both are verbs.

Word	Noun	Adjective	Verb	Adverb
invent	No	No	Yes	No
create mentally	No	No	Yes	No

As verbs, create mentally is a hypernym of invent; that is, create mentally is a word with a broader meaning than invent:

invent: come up with (an idea, plan, explanation, theory, or principle) after a mental effort
create mentally: create mentally and abstractly rather than with one's hands

Other hypernyms of invent include create by mental act.

invent (verb)	create mentally (verb)
come up with (an idea, plan, explanation, theory, or principle) after a mental effort	create mentally and abstractly rather than with one's hands
concoct something artificial or untrue