insure + to buy protection against possible loss/damage/injury
sure + having no doubts about something
surely + With certainty; definitely
assure + To make sure that something happens
exposure + state of experiencing something directly
measure + To calculate size, weight or temperature of
measurement + size or amount of something or someone
pleasure + feeling of happiness, enjoyment, or satisfaction
pressure + the force/weight when pressing against a thing
ensure + To make something sure, certain, or safe