Buoyancy (10)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">buoyancy</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for resilience that I've seen before include "Ability to spring back" , "Ability to bounce back" , "Capacity to recover quickly from difficulties" , "Ability to withstand criticism" , "flexibility" .)