This word is acceptable for play in the UK dictionary that is being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A person who experiences.

n. A thematic relation where something undergoes a situation or sensation lacking a semantic agent.

n. One who experiences.

n. An experimenter.

n. One who experiences; one who makes trials or experiments.

"Instead of whoring himself out like every other tell-all Roswell "experiencer", Haut held onto his cards for the most meaningful public impact."

experimenter   

enjoyer    achiever    up-bringing    hairiness    interestingness