designer vs landscaper

designer and landscaper both are nouns.

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

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

designer: someone who creates plans to be used in making something (such as buildings)
landscaper: someone who arranges features of the landscape or garden attractively

Other hyponyms of designer include landscape architect, landscape gardener, landscapist, Ithiel Town, Town.

designer (noun)	landscaper (noun)
someone who creates plans to be used in making something (such as buildings)	someone who arranges features of the landscape or garden attractively
someone who designs clothing
a person who specializes in interior design
a person who devises plots or intrigues
someone who specializes in graphic design