1) Chamberlain, by reputation 2) Concessions source 3) Conciliator 4) Make-peace 5) Neville Chamberlain was one 6) One who gives in easily 7) Pacifier 8) Peacemaker 9) Reconciler 10) Role for Chamberlain 
• (n.) One who appeases; a pacifier.
Ap·peas'er noun One who appeases; a pacifier. 
[n] - someone who tries to bring peace by acceding to demands
appeaser 1. Someone who tries to bring peace by acceding to demands: 'An appeaser is one who feeds a crocodile; hoping it will eat him last'; according to Winston Churchill. 2. Anyone who tries to bring a situation to a state of peace or quiet.
noun someone who tries to bring peace by acceding to demands; `An appeaser is one who feeds a crocodile--hoping it will eat him last`--Winston Churchill