concoct vs create mentally

concoct and create mentally both are verbs.

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

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

concoct: devise or invent
create mentally: create mentally and abstractly rather than with one's hands

Other hypernyms of concoct include create by mental act.

concoct (verb)	create mentally (verb)
make a concoction (of) by mixing	create mentally and abstractly rather than with one's hands
devise or invent
prepare or cook by mixing ingredients
invent