Preposition: on

• behalf: The former is concerned to act on behalf of the mass of the peasantry.

Preposition: as

• catalyst: The Council strongly believes to ensure consistency, and act as a catalyst, that the districts contribution to partnerships should be routinely judged.

• deterrent: During the War he helped to overcome the problem of the failure of barrage balloons to act as deterrents to enemy aircraft.

• agent: First, " What drives people to become coaches and spend their time acting as change agents for others?

• intermediary: They act as an intermediary between reality and the general public.

• trustee: There is no reason why the injured party cannot act as trustee.

Adjective modifier

• terrorist: Sometimes governments justify their own terrorist acts by labeling any groups that resist their monopoly of violence " terrorist " .

• criminal: It should not be used to commit any criminal acts or harassment.

Converse of object

• commit: He decided to proceed with a lesser charge of committing an act likely to assist the enemy.

• perform: Men perform one great act of faith at the beginning of their life, then have done with it for ever.

Followed by an intransitive particle

• upon: Any advice that you receive or act upon is done entirely at your own free will.

Preposition: in

• accordance: Mr Blair last month said Britain " will always act in accordance with international law " .

Preposition: of

• terrorism: Everyone everywhere condemns without reservation the act of terrorism.

• kindness: At hundreds of churches there have been random acts of kindness.

• vandalism: That was an act of political vandalism that's costing British business an extra £ 10 billion in this Parliament.

• violence: Fire, asbestos exposure, and an act of violence accounted for the remaining fatalities.

• parliament: It was founded by an act of parliament in 1947.

Preposition: with

• impunity: The story wasn't news anymore and without the press around the security acted with impunity.

Noun used with modifier

• headline: Headline act Beluga from Deeside showed they are extremely competent musicians.