oiler

nouns

a worker who oils engines or machinery
oiler
is derived from
oil
is derived from
oil
is a type of (narrower)
a person who works at a specific occupation
"he is a good worker"
worker
a well that yields or has yielded oil
oil well, oiler
is derived from
oil
a cargo ship designed to carry crude oil in bulk
oil tanker, oiler, tank ship, tanker
is derived from
oil