Words that ridicule two bears! (4-4)
I believe the answer is:
pooh-pooh
'words that ridicule' is the definition.
Although both the answer and 'words' are verbs, they are not in the same form of the verb.
'two bears' is the wordplay.
'two bears' means two substitutions for 'bear'.
'bear' becomes 'pooh' (Winnie the Pooh).
'bear' becomes 'pooh' (Winnie the Pooh).
'pooh'+'pooh'='POOH-POOH'
Can you help me to learn more?
(Other definitions for pooh-pooh that I've seen before include "Slight" , "Dismiss as foolish" , "Mock, make light of" , "Dismiss with contempt" , "Disparage - put through hoops" .)