123441b0_guage__How_to_Speak_Vegetarian__Examples
Euthanize, put down (euphemisms; soft words for hard deeds) Kill, murder (reflects what too often happens when NHAs are used in research) [Examples] 
After the experiment, the researchers euthanized the chimp, because it was in a great deal of pain, pain that the experimenters had caused. After the experiment, the researchers killed the chimp, because she was in a great deal of pain, pain that the experimenters had caused.
World Vegetarian Congress, 2004 - Animal-Friendly Language: How to Speak Vegetarian
Examples