There are several synonyms for the word "ex-tensibilities" which is the plural form of "ex-tensibility". This refers to the quality or state of being able to be stretched or extended. Some synonyms for this word include elasticity, pliability, flexibility, adaptability, malleability, and bendability. All these words have a similar meaning as ex-tensibilities and convey the idea of something that can be extended or stretched without breaking. These synonyms can be used interchangeably depending on the context and the specific meaning that one wants to convey. For instance, one may use "flexibility" to refer to the physical ability to bend, while "malleability" may be used to describe the ability to be altered or reshaped.