user

nouns

a person who makes use of a thing; someone who uses or employs something
user
is derived from
use
is a type of (narrower)
a human being
"there was too much for one person to do"
individual, mortal, person, somebody, someone, soul
a person who uses something or someone selfishly or unethically
exploiter, user
is derived from
use
a person who takes drugs
drug user, substance abuser, user
is derived from
use