- 彩虹吸蜜鹦鹉 cǎihóngxīmìyīngwǔ rainbow lorikeetrainbow lorikeet (Trichoglossus moluccanus)
- 彩虹屁 cǎihóngpì excessive praise(slang) exaggerated or over-the-top praise; fawning or sycophantic flattery, usually by a fan toward their idol
- 彩虹族群 cǎihóngzúqún LGBT+ communityThe rainbow community, referring to LGBT+ people and groups; collectively used to describe individuals of diverse sexual orientations and gender identities.
- 彩虹旗 cǎihóngqí rainbow flagrainbow flag, often used as a symbol of LGBT pride
- 彩虹明樱蛤 cǎihóngmíngyīnggé rainbow tellinsmall bivalve mollusk or clam often consumed as a snack
- 彩虹蜂虎 cǎihóngfēnghǔ rainbow bee-eatera bird species, Merops ornatus
- 彩虹行动 cǎihóngxíngdòng Operation RainbowRefers to two mass scuttling operations carried out by the German navy to prevent ships from falling into enemy hands: the scuttling of the High Seas Fleet at Scapa Flow in 1919 and the 1945 scuttling of U-boats; both utilized "Rainbow" as the secret code word.
- 彩虹鹦鹉 cǎihóngyīngwǔ coconut lorikeeta brightly colored species of parrot native to the Maluku Islands and surrounding regions (Trichoglossus haematodus)
