Synonyms
Antonyms

1. r

noun. ['ˈɑːr'] the 18th letter of the Roman alphabet.

Synonyms

  • letter
  • alphabetic character
  • letter of the alphabet
  • Latin alphabet
  • Roman alphabet

Antonyms

  • longness

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Words that Rhyme with R

  • ahr
  • ar
  • r.

How do you pronounce r?

Pronounce r as ɑr.

US - How to pronounce r in American English

UK - How to pronounce r in British English

2. R._J._Mitchell

noun. English aeronautical engineer (1895-1937).

Synonyms

  • Mitchell

3. R._B._Cattell

noun. American psychologist (born in England) who developed a broad theory of human behavior based on multivariate research (1905-1998).

Synonyms

  • Ray Cattell
  • Raymond Bernard Cattell
  • Raymond B. Cattell

4. CD-R

noun. a compact disc on which you can write only once and thereafter is read-only memory.

Synonyms

  • CD-WO
  • compact disk
  • CD
  • compact disc
  • compact disc recordable

5. R-2

noun. street names for flunitrazepan.

Synonyms

  • roach
  • roofy
  • Mexican valium
  • Rohypnol
  • rope
  • forget me drug
  • circle
  • rophy

Antonyms

  • stay in place

6. R._Buckminster_Fuller

noun. United States architect who invented the geodesic dome (1895-1983).

Synonyms

  • Buckminster Fuller
  • Fuller

7. R

noun. a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air.

Synonyms

  • roentgen

8. R

noun. the 18th letter of the Roman alphabet.

Synonyms

  • letter
  • alphabetic character
  • letter of the alphabet
  • Latin alphabet
  • Roman alphabet

Antonyms

  • unstable
  • changeable
  • variable
  • inconstant

9. r

noun. ['ˈɑːr'] the length of a line segment between the center and circumference of a circle or sphere.

Synonyms

  • radius of curvature
  • semidiameter
  • diam
  • radius
  • length

Antonyms

  • short
  • shortness
  • permanence
  • long

10. R

noun. (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole.

Synonyms

  • universal gas constant
  • gas constant

Antonyms

  • discontinuous
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