astronaut- n. a person who travels in space

　　astronomy - n. the scientific study of stars and the universe

　　asylum -n. political protection given by a government to a person from another country

　　at - prep. in or near ; where ; when

　　atmosphere - n. the gases surrounding any star or planet

　　attach - v. to tie together; to connect

　　attack - n. a violent attempt to damage, injure or kill; v. to start a fight

　　attempt - v. to work toward something; to try; to make an effort

　　attend - v. to be present at

　　automobile - n. a vehicle with wheels used to carry people; a car

　　autumn - n. the time of the year between summer and winter

　　average - n. something representing the middle; ad. common; normal

　　avoid - v. to stay away from

　　awake - ad. not sleeping

　　award - n. an honor or prize for an act or service

　　away - ad. not near