This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. One who or that which utilizes. Also spelled utiliser.

n. someone who puts to good use

"The findings indicate that farmers have a medium level of overall knowledge on rice cultivation, so that there is a potential for further advancement of knowledge at the utilizer level."

user