In Act 3, Scene 2:
CALIBAN
(to TRINCULO) Thou liest, thou jesting monkey, thou! I would my valiant master would destroy thee. I do not lie. " (The Tempest, Act 3, Scene 2)
Caliban calls Ariel "a jesting monkey" and a liar, who is in turn, speaking as Trínculo. Ariel is imitating Trínculo´s voice and is invisible, thus the confussion. It is worth mentioning that "jester" means fool.
The figure of speech used in the lines from sonnet 10 might be personification, in this case, of the word Death. It might be said that personification is the figure of speech in which something nonhuman is given human characteristics. So the "Death" is firstly, personified by introducing it in capital letters, which means it is used as a name, a proper name. then it is given human characteristics, like "proud" "mighty" and "dreadful"
shark is to fish as crocodile is to reptile
hope that helps
