designer vs planner

designer and planner both are nouns.

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

As nouns, planner is a hypernym of designer; that is, planner is a word with a broader meaning than designer:

Other hypernyms of designer include contriver, deviser.

designer (noun)	planner (noun)
someone who creates plans to be used in making something (such as buildings)	a notebook for recording appointments and things to be done, etc.
someone who designs clothing	a person who makes plans
a person who specializes in interior design
a person who devises plots or intrigues
someone who specializes in graphic design