cosmos vs macrocosm

cosmos and macrocosm both are nouns.

Word	Noun	Adjective	Verb	Adverb
cosmos	Yes	No	No	No
macrocosm	Yes	No	No	No

As nouns, cosmos and macrocosm are synonyms defined as:

Other synonyms of cosmos include creation, existence, universe, world.

cosmos (noun)	macrocosm (noun)
everything that exists anywhere	everything that exists anywhere
any of various mostly Mexican herbs of the genus Cosmos having radiate heads of variously colored flowers and pinnate leaves; popular fall-blooming annuals