I don't mean to be the faultfinder, but there are a few disputable entries in the dictionary.
Threehorn for example would probably refer to all kinds of Cerapods sporting three distinctive horns. This would include not just Triceratops but also Torosaurus, Chasmosaurus, Anchieceratops... the list goes on.
Swimmer too would probably describe not just Saurolophus but any kind of amphibic dinsaur. Many Hadrosaur species would be included in this Parasaurolophus and Edmontosaurus for example.
Spiketail is the same story. We only over saw Stegosaurus in LBT but other representatives of the family Stegosauridae would probably be included though I suppose they might make up different names for species which feature additional distinctive features to their spiked tails.
Sharptooth is the same story. Whatever will eat you is labeled a sharptooth by the dinosaurs of the Great Valley. I suppose they might come up with additional descriptions if they want to differentiate between large carnivores, raptors etc. but a sharptooth is definitely not just a T-Rex.
A swimming sharptooth may also be something else than a shark. The Liopleurodon in LBT 9 is one example. Again I think that anything that swimms and will try to eat you will qualify for the term swimming sharptooth (but an interesting question is how amphibic sharpteeth (Dill for example) might be referred to).
A tinysaurus is definitely not a synonyme for Sauropod. If that was the case Apatosaurus, Diploducus, Brachiosaurus and all longnecks would be Tinysaurs as well.
A longneck however probably refers to all sauropods, no matter their size.
There is one entry I don't understand:
Splasher Swimmer :Marco Polo (game)
What does Marco Polo refer to in this case? Is the term from a TV episode?