Among the deadliest creatures on the island, Tyrannosaurus dominum is a killing machine. Active mostly when hunting for food or defending its nest, a reasonable plan is to avoid every Tyrannosaurus. I've seen no creature on the island that can contest Tyrannosaurus for sheer dominance. It is pure power - from its bite, to its stomp, to its tail, to its arms.
Taming a Tyrannosaurus is without a doubt a primary goal for any aspiring warlord or warring Tribes. There is a reason Tyrannosaurus is considered the king of the dinosaurs (or with this genus, the 'lord'). A Tribe that actually manages to tame one has almost nothing to fear to challenge their power.
Despite being a different species of Tyrannosaurus, everyone I've met still refers to them as a “Rex” or a “T-Rex.” I've long since stopped trying to convince anyone especially the few who I've seen wearing Tyrannosaurus teeth as necklaces.