Involvement
Part of speech: noun
Definition: The act of involving, or the state of being involved.
Example sentence: 'War on terror' is a misnomer. It would be like calling America's involvement in World War II a 'war on kamikazism.' Terrorism, like kamikazism, is a tactic.
Participation
Part of speech: noun
Definition: the act of participatingthe state of being related to a larger wholethe process during which individuals, groups and organizations are consulted about or have the opportunity to become actively involved in a project or program of activity.An ownership interest or profit-sharing right.
Example sentence: Marriage is the highest state of friendship. If happy, it lessens our cares by dividing them, at the same time that it doubles our pleasures by mutual participation.