Angry, furious (3)
I believe the answer is:
mad
I believe this clue is a double definition.
'angry' is the first definition.
(similar in meaning)
'furious' is the second definition.
(I've seen this in another clue)
(Other definitions for mad that I've seen before include "like the March Hare" , "Deranged" , "lunatic" , "Insane - furious" , "Angry or insane" .)