I'm not sure where you found this really weird text, but basically they're puns. Dinosaurs are the topic of the piece, I assume, and so the author has tried to insert the word 'saur' (from dinoSAUR) into other words which have similar sounds: the first one, "saur" = "saw" as in the past tense of 'to see' dinoscovery = discovery of a dinosaur, I assume! disconsorting = "disconcerting" (it's weird to use it here, because he didn't even use the spelling of 'saur'! saur monstrous = "so monstrous" reasaurus = "reassurance" Honestly this is not a very well-written piece!

These aren't real words. The writer is indulging in word-play - jokes about the word 'dinosaur'. It's all very silly and won't help you learn English at all. Ignore it and find something more worthwhile to read!