Words starting with "eu" with the meaning of "good" or "well":
* Eulogy: A speech praising someone who has died.
* Eudaimonia: A state of happiness and flourishing, often used in philosophy.
* Euphemism: A mild or indirect word or expression substituted for one considered to be too harsh or blunt.
* Euphony: Pleasing sounds, especially in speech or music.
* Euphoric: Feeling intense happiness and excitement.
* Eurythmy: A form of expressive movement based on rhythm and sound.
* Euthanasia: The practice of intentionally ending a life to relieve pain and suffering.
* Euthenics: The science of improving the human race by means of environmental control.
* Eutopia: An imagined place or state of things in which everything is perfect.
* Eutrophia: A state of having a balanced and adequate supply of nutrients.
Words starting with "eu" with other meanings:
* European: Relating to Europe or its people.
* Eukaryotic: Relating to cells that have a nucleus.
* Eustachian tube: A tube connecting the middle ear to the back of the throat.
* Eustress: Positive stress that motivates and helps people perform well.
* Euthenics: The science of improving the human race by means of environmental control.
This list is not exhaustive, but it provides a good starting point for words that begin with the root "eu."