The word 'restrainable' refers to something that can be limited or restricted. There are several synonyms for this word such as controllable, manageable, curbed, restricted, restricted, and limited. These words signify the ability to contain or control actions or behaviors. 'Manageable' portrays a situation that can be handled and controlled, while 'curbed' suggests a sense of confinement and restriction. 'Restricted' and 'limited' are words connoting a sense of control over what can and cannot be done or said. In essence, all of these synonyms signify the ability to limit or restrict something, but the context in which they are used makes them more suitable in different situations.