What is a literary device in Act 4, Scene 4 of Romeo and Juliet?

There are a
couple of literary devices worth noting in this scene of this play.

First of
all,uses awhen she calls Capulet a "mouse-hunt." What she means is that Capulet used
to chase women amorously, just as a cat would chase a mouse. In other words, she is comparing
him to a cat and those women to mice.

Secondly, Capulet uses awhen talking to
the servants about collecting logs. The pun appears when Capulet calls the second servant a
"logger-head." In the literal sense, Capulet is referring to the finding of logs for
the wedding, but what Capulet really means here is that the second servant is being stupid: the
implication being that the servant has wooden logs in his head instead of a brain.