experimenter a research worker who conducts experiments
experimental of the nature of or undergoing a trial
experiment the act of conducting a controlled test or investigation
experimentally in an experimental fashion
experience the content of observation or participation in an event
experimentation the testing of an idea
exterminator someone who exterminates
expedient appropriate to a purpose
experient having experience
experimenter bias (psychology) bias introduced by an experimenter whose expectations about the outcome of the experiment can be subtly communicated to the participants in the experiment
exuberant joyously unrestrained
experiential of or relating to direct observation or participation
experimentalism an empirical doctrine that advocates experimental principles
excrement waste matter discharged from the body
exterminate kill on a large scale
experienced having knowledge or skill from observation or participation
expedite process fast and efficiently
complimentary expressing praise and admiration
expediently in an expedient manner
exterminated destroyed completely