13-Letter Words Containing: O,N,N,E,S,S

• an instrument that indicates whether two periodic motions are synchronous (especially an instrument that enables a pilot to synchronize the propellers of a plane that has two or more engines)

• pleasantness resulting from something that can be enjoyed

• the doctrine of expanding the territory or the economic influence of a country

• the quality of being offensive

• the quality of being hateful

• the state of being sensitive (as to an antigen)

• (psychology) the process of becoming highly sensitive to specific events or situations (especially emotional events or situations)

• rendering an organism sensitive to a serum by a series of injections