1) Absence of action 2) Abstinence from action 3) Conservative policy 4) Doing what they do best 5) Dormancy 6) Fabian policy 7) French word used in English 8) Idleness 9) Immobility 10) Inactiveness 11) Inactivity 12) Inertia 13) Lack of response 14) Neglect 15) Noninterference 16) Nonintervention Found on https://www.crosswordclues.com/clue/inaction
In·ac'tion noun [ Prefix in . not + action : confer inaction .] Want of action or activity; forbearance from labor; idleness; rest; inertness. Berkeley. Found on http://www.encyclo.co.uk/webster/I/27