Scaling Mount Kilimanjaro is generally called a climb. This may lead to the misperception that it might be technically demanding and out of reach for most people—it isn’t.
As most trips are 6-8 days in length, it may be more accurately described as a trek, meaning that one needs to carry a substantial amount of supplies. Then again, however, the burden of carrying your gear is handed off to your porters so it ends up being more like a hike for the majority of tourists.
However, calling it a hike might not do justice to the fact that the climb reaches high elevations and could lead climbers to underestimate the difficulty and dangers of high altitude.