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English Words Starting With R

5,802 entries — pick a word to see its definition, pronunciation, and usage.

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Noun Verb Adjective Adverb Plural noun Combining form Verb (transitive)Verb (intransitive)Verb (ambitransitive)

richter scale
nounB2
/ˈrɪktə skeɪl/A logarithmic scale for expressing the magnitude of an earthquake based on the amplitude of its seismic waves.
richthofen
nounVery Low
/ˈrɪxtˌhəʊfən/A proper noun, the surname of the German flying ace Manfred von Richthofen, famously known as the Red Baron.
richweed
nounRare
/ˈrɪtʃwiːd/A plant, especially of the genus Pilea, known for having a rich, succulent appearance.
ricin
nounC1/C2 (Very low frequency, specialist/vocational)
/ˈrʌɪsɪn/A highly toxic, naturally occurring protein compound extracted from the seeds of the castor oil plant (Ricinus communis).
ricinoleic acid
nounVery low
/ˌrɪsɪnəʊˈliːɪk ˈæsɪd/An unsaturated fatty acid that is the main component of castor oil.
ricinolein
nounVery Low
/ˌrɪsɪˈnəʊliɪn/A triglyceride present in castor oil, specifically the glycerol ester of ricinoleic acid.
ricinus oil
nounC2
/ˈrɪsɪnəs ɔɪl/A thick, pale-yellow vegetable oil pressed from the seeds of the castor oil plant (Ricinus communis).
rick
nounverbverb-transitiveLow
/rɪk/A large stack of hay, straw, or other harvested material, typically stored outdoors in a regular shape.
rickenbacker
nounC2
/ˈrɪkənˌbækə/A brand name for high-quality electric guitars and basses, originating from the Rickenbacker International Corporation. It refers specifically to the instruments produced by this company.
ricker
nounLow
/ˈrɪkə/A young, slender tree, especially one suitable for use as a pole or in wickerwork.
rickets
nounC1
/ˈrɪkɪts/A childhood disease caused by vitamin D deficiency, resulting in softening and weakening of the bones.
rickettsia
nounLow
/rɪˈkɛtsɪə/Any of a group of small, non-motile, rod-shaped, intracellular parasitic bacteria that cause several serious diseases in humans, transmitted primarily by arthropod vectors like ticks, lice, and fleas.
rickettsial disease
nounVery Low
/rɪˌkɛt.si.əl dɪˈziːz/An infectious illness caused by bacteria of the family Rickettsiaceae, often transmitted by arthropods such as ticks, fleas, and lice.
rickey
nounLow
/ˈrɪk.i/A mixed alcoholic drink, typically made with spirits (traditionally gin or bourbon), lime juice, and carbonated water over ice.
rickle
nounVery Low (Dialectal/Regional/Obsolescent)
/ˈrɪk(ə)l/A loosely piled or stacked heap of something, often stones or bricks.
rickover
nounVery Low (Proper Noun)
/ˈrɪkəʊvə/A surname of German origin, most famously associated with Admiral Hyman G. Rickover, who played a pivotal role in developing the United States Navy's nuclear submarine program.
rickrack
nounLow
/ˈrɪk.ræk/A flat, zigzag or wavy decorative braid or ribbon used in sewing, crafting, or trimming garments.
rickshaw
nounC1
/ˈrɪk.ʃɔː/A small, two-wheeled passenger vehicle pulled by one person.
ricky
nounC1
/ˈrɪki/A masculine given name, a diminutive form of Richard, meaning 'powerful ruler' or 'brave ruler'.
ricky-tick
adjectivenounLow
/ˌrɪk.i ˈtɪk/Promptly, immediately, or in a fast, efficient manner (often implying a sense of urgency or brisk execution).

Showing 3721–3740 of 5802 words.