The Esperanto words for alien and foreigner are eksterterulo and fremdulo respectively, with the former referring to someone from another planet and the latter to someone from Another Country.
The word for extraterrestrial is eksterterulo, which could also serve as a translation for alien, unless alien is meant to mean foreigner, in which case fremdulo is the appropriate translation.
foreigner, alien
The Esperanto words for far and away are malproskime and for.
The Esperanto words for astronaut and cosmonaut are very similar to the English words. In Esperanto you would use astronaŭto and kosmonaŭto.
The Esperanto words for boring and fun are enuiga and amuza.
Alien
The Esperanto words for near and far are proksime and malproksime.
The Esperanto words for car and driver are aŭto and ŝoforo.
The Esperanto words for alive and dead are vivas and mortinto.
The Esperanto words for hungry and full are malsata and plena.
The Esperanto words for broken and fixed are rompita and fiksa.
The Esperanto words for foreign and native are eksterlanda and denaska.