scheming vs conniving

scheming and conniving both are adjectives.

Word	Noun	Adjective	Verb	Adverb
scheming	No	Yes	No	No
conniving	No	Yes	No	No

As adjectives, scheming and conniving are synonyms defined as:

Other synonyms of scheming include calculating, calculative, shrewd.

scheming (adjective)	conniving (adjective)
concealing crafty designs for advancing your own interest	acting together in secret toward a fraudulent or illegal end
acting with a specific goal	acting with a specific goal