"coexist alongside" is a correct and usable phrase in written English.
It means to exist together in the same space or time. It can be used to describe how two or more things, ideas, or people can peacefully exist and interact with each other without conflict. Example: The two religions have learned to coexist alongside each other in this diverse community, promoting mutual respect and understanding.
And neither is he attempting to put them all together in a soup-like fusion: instead, he's allowing the different worlds of Brazil - its different peoples, its wildly divergent landscapes, its unknowable richness of forest, of animal and plant life - to coexist alongside and on top of one another, sometimes in harmony, but often in conflict and irresolution, too.
The Kazakhs' traditional customs uneasily coexist alongside incursions of the modern world.
"The challenge will be to see how it can coexist alongside personal relationship.
More direct pathways from HSC to specific mature cells may coexist alongside traditional models of progenitor population hierarchies.
More than Words shows how Balinese practices of apotropaic writing on palm-leaves, amulets, and bodies challenge these notions, and yet coexist alongside them.
A sparsely populated republic of rugged forests, mountains and plains, Tuva is renowned for its traditional throat-singing and for ancient shamanistic religious practices, which coexist alongside Buddhism.
Despite progress, Morocco is still an absolute monarchy where dire poverty coexists alongside lavish wealth.
This coexisted alongside the original currency, which would remain pegged to the spirit of the revolution.
Thailand increasingly exists as a place of contradictions, where ancient animism coexists alongside hyper-capitalist modernity.
Playing someone whose dependency on drink isn't a problem only because he has become "used to it again," the star suggests the desperation that coexists alongside Butley's readily-slung broadsides.
But Armstrong was a joyful man in an ugly time, and his natural savoir-faire coexisted alongside bitterness that his white musician friends never invited him to their homes, and that, when touring in the South, he had to eat his meals on the bus, because restaurants wouldn't serve him.
