4-Letter Words Starting R & Ending S

• deciduous or evergreen shrubs and shrubby trees of temperate and subtropical North America, South Africa, eastern Asia and northeastern Australia; usually limited to nonpoisonous sumacs (see genus Toxicodendron)

• a column of light (as from a beacon)

• a branch of an umbel or an umbelliform inflorescence

• (mathematics) a straight line extending from a point

• a group of nearly parallel lines of electromagnetic radiation

• the syllable naming the second (supertonic) note of any major scale in solmization

• any of the stiff bony spines in the fin of a fish

• cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins

• emit as rays

• extend or spread outward from a center or focus or inward towards a center

• expose to radiation

• (sports) the chief official (as in boxing or American football) who is expected to ensure fair play

• The seventeenth letter of the Modern Greek and Classical alphabets and the nineteenth letter of Old and Ancient.

• The sensitivity of the option value to the risk-free interest rate.

• a shag rug made in Sweden

• the seed of the cereal grass

• hardy annual cereal grass widely cultivated in northern Europe where its grain is the chief ingredient of black bread and in North America for forage and soil improvement

• whiskey distilled from rye or rye and malt

• rate of revolution of a motor

• increase the number of rotations per minute

• an angry dispute

• an arrangement of objects or people side by side in a line

• a long continuous strip (usually running horizontally)

• (construction) a layer of masonry

• a linear array of numbers, letters, or symbols side by side

• a continuous chronological succession without an interruption

• the act of rowing as a sport

• propel with oars