-eer

One who makes it his business to criticize diction or style in language.

To rule tyrannically, or behave in an overbearing way.

1. Someone who works actively for a political candidate or a party.
2. To take an active part in an election campaign; especially, as, or on behalf of, a candidate for political office.

1. Someone who climbs mountains for sport.
2. A mountain inhabitant or someone who lives in a mountainous area.

1. A person or group that is the first to do something or that leads in developing something new.
2. A person who is one of the first from another country or region to explore or settle a new area.
3. A foot soldier whose duties include going ahead of the main company to construct things to pave the way for them.
4. The first species of plant or animal life to begin living in a previously unoccupied site; for example, a moss beginning to grow on otherwise bare rock.
5. Etymology: from 1523, "foot soldier who prepares the way for the army", from Middle French pionnier, from Old French paonier, "foot soldier" from about the 11th century from peon.

1. A ship privately owned and crewed but authorized by a government during wartime to attack and capture enemy vessels.
2. The commander or one of the crew of such a ship.
3. Etymology: originally "a private man of war" (1646), from private, probably modeled on volunteer and buccaneer (someone who robs at sea or plunders the land from the sea without having a commission from any sovereign nation).

Someone who is armed with a truncheon.

1. One who willingly offers or enrolls himself/herself for military service, in contrast to those who are under obligation to do so, or who form part of a regular army or military force.
2. One who voluntarily offers his services in any capacity; one who of his own free will takes part in any enterprise or activity.
3. To offer to undertake or perform (something).

The action of serving, or offering one’s services, as a volunteer.