meeting all three important requirements

(fiction) Hanahaki, an illness affecting those consumed by unrequited love that manifests as the coughing up of flowers, which clears up upon reciprocation. A fictional illness, it has found popularity among both Japanese and foreign online fanfic (especially) artists and authors for its poetic quality.

flat / level / even / smooth

精神分裂病:

編曲者: arranger, adapter

水中: in the water / 水柱: column of water

製糸業者: silk manufacturer / 製紙業者: paper manufacturer

観覧車: a Ferris wheel / 観覧者: a spectator

地震学者: seismologist

ケイ素樹脂: silicone resin