planner vs schemer

planner and schemer both are nouns.

Word	Noun	Adjective	Verb	Adverb
planner	Yes	No	No	No
schemer	Yes	No	No	No

As nouns, schemer is a hyponym of planner; that is, schemer is a word with a more specific, narrower meaning than planner:

Other hyponyms of planner include designer, intriguer, maneuverer, manoeuvrer, plotter, strategian, strategist, tactician.

planner (noun)	schemer (noun)
a notebook for recording appointments and things to be done, etc.	a planner who draws up a personal scheme of action
a person who makes plans