Collocations for prose - noun

clear, lucid, plain, simple, straightforward
elegant, flowing, lyrical, poetic
flowery, purple (= elaborate or exaggerated in style)
descriptive
continuous
I plan out an essay in note form before writing it up in continuous prose.

academic, literary

piece

write, write in
craft

works, writing
writer
style
narrative
passage, piece, text
fiction

in prose
a passage in prose