4-Letter Words Containing: RO

• 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 mixture of fat and flour heated and used as a basis for sauces

• a lump or mass of hard consolidated mineral matter

• United States gynecologist and devout Catholic who conducted the first clinical trials of the oral contraceptive pill (1890-1984)

• material consisting of the aggregate of minerals like those making up the Earth's crust

• (figurative) someone who is strong and stable and dependable

• hard bright-colored stick candy (typically flavored with peppermint)

• a genre of popular music originating in the 1950s; a blend of black rhythm-and-blues with white country-and-western

• pitching dangerously to one side

• move back and forth or sideways

• cause to move back and forth

• A woman; a wife, especially a Dutch or German one.

• A slovenly woman; a wench; a lusty woman.

• A big, fat woman; a slovenly, coarse, or untidy woman; a woman of low character.

• A cleaving tool for splitting cask staves and shingles from the block.

• A dirty woman; a slattern; a frow.

• A cleaving tool with handle at right angles to the blade, for splitting cask staves and shingles from the block; a frower.

• Brittle; tender; crisp

• Used to indicate source or provenance.

• Originating at (a year, time, etc.)

• Used to indicate a starting point or initial reference.

• Indicating removal or separation.

• Indicating exclusion.

• Indicating differentiation.

• Produced with or out of (a substance or material).

• Used to indicate causation; because of, as a result of.

• black birds having a raucous call

• a member of the Siouan people formerly living in eastern Montana

• the cry of a cock (or an imitation of it)

• a small quadrilateral constellation in the Southern Hemisphere near Virgo

• an instance of boastful talk

• a Siouan language spoken by the Crow

• dwell on with satisfaction

• express pleasure verbally

• utter shrill sounds

• the part of the face above the eyes

• the arch of hair above each eye

• the peak of a hill

• someone who is a member of the faculty at a college or university

• A pyromaniac

• Pyrocellulose

• Pyrotechnician

• Pyrotechnics

• Pyrogallic acid

• Pyromaniac, pyromaniacal

• Pyrotechnic