Anagrams of: CEOORV_

• A groove at the ends of the staves of a barrel into which the edge of the head is fitted.

• A cooper's tool for making these grooves.

• Cousin (usually as a term of address)

• Because

• of or relating to the null set (a set with no members)

• a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential

• a mathematical element that when added to another number yields the same number

• the point on a scale from which positive or negative numerical quantities can be measured

• the sight setting that will cause a projectile to hit the center of the target with no wind blowing

• indicating the absence of any or all units under consideration

• having no measurable or otherwise determinable value

• indicating an initial point or origin

• adjust (an instrument or device) to zero value

• adjust (as by firing under test conditions) the zero of (a gun)

• a small collection of people

• a small flock of grouse or partridge

• any thick, viscous matter

• the process of seeping

• pass gradually or leak through or as if through small openings

• release (a liquid) in drops or small quantities

• cause annoyance in; disturb, especially by minor irritations

• disturb the peace of mind of; afflict with mental agitation or distress

• change the arrangement or position of

• subject to prolonged examination, discussion, or deliberation

• be a mystery or bewildering to

• the sound made by the vibration of vocal folds modified by the resonance of the vocal tract

• pasta shaped like pearls of barley; frequently prepared with lamb in Greek cuisine