back
to get the back of somebody's behaviour

baffle
I was baffled by his behaviour

behaviour
behaviour therapy

disruptive
disruptive behaviour

gallant
gallant behaviour

good
good behaviour

hallmark
this attitude hallmarks his behaviour

hold with
I don't hold with his behaviour

model
model behaviour

obstreperous
obstreperous behaviour

opprobrious
opprobrious behaviour

outcome
...of his behaviour

outrageous
outrageous behaviour

pattern
behaviour patterns

respectful
respectful behaviour

send down
...his bad behaviour

shape up
...up your behaviour, I'll have to call your parents

shocking
shocking behaviour

strange
a strange behaviour

threatening
threatening behaviour

unreasonable
unreasonable behaviour

worthy
his behaviour is worthy of great praise