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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)

rhododendron
nounC1
/ˌrəʊdəˈdendrən/A type of evergreen or deciduous shrub or small tree with large clusters of showy flowers, typically pink, purple, white, or red.
rhododendron bug
nounRare
/ˌrəʊdəˈdɛndrən bʌɡ/A common name for a specific insect (Stephanitis rhododendri) that feeds on and damages rhododendron plants.
rhodolite
nounVery low
/ˈrəʊdəlaɪt/A pink to rose-red gemstone variety of the mineral garnet.
rhodomontade
nounVery Low (Archaic/Literary)
/ˌrɒdəmɒnˈteɪd/Boastful or inflated talk; bluster; pretentious bragging.
rhodonite
nounC1/C2
/ˈrəʊdənaɪt/A pink to red manganese silicate mineral, often with black veins of manganese oxide.
rhodope
nounVery Low
/ˈrɒdəpiː/A proper noun referring primarily to a mountain range in Southeast Europe, located in Southern Bulgaria and Northern Greece.
rhodope mountains
plural-nounLow
/ˈrɒdəpi ˈmaʊntɪnz/A mountain range in Southeastern Europe, primarily located in Bulgaria and Greece.
rhodopsin
nounC2
/rəʊˈdɒpsɪn/A red pigment in the retina of the eye that enables vision in dim light.
rhodora
nounVery low (C2+ rare/technical)
/rəʊˈdɔːrə/a deciduous flowering shrub native to northeastern North America, characterized by pink-purple blossoms that appear before its leaves in spring.
rhodos
nounVery Low
/ˈrəʊdɒs/A genus of flowering shrubs and plants commonly known as rhododendrons.
rhoecus
nounExtremely Rare
/ˈriːkəs/In Greek mythology, a figure (often a centaur or a man) associated with legendary stories, particularly involving encounters with the gods.
rhoicissus
nounVery Low / Obscure
/rɔɪˈsɪsəs/A genus of flowering plants in the grape family (Vitaceae), native to Africa, often climbing or trailing vines.
rhomb
nounLow
/rɒm/A parallelogram with equal sides and opposite equal acute and obtuse angles; a diamond-shaped figure.
rhombencephalon
nounRare/Very Low
/ˌrɒmbɛnˈsɛfəlɒn/The hindbrain; the posterior region of the brain during embryonic development, which later differentiates into structures like the cerebellum, pons, and medulla oblongata.
rhombic aerial
nounRare
/ˈrɒm.bɪk ˈeə.ri.əl/A diamond-shaped antenna used for high-frequency radio transmission and reception.
rhombohedron
nounVery Low
/ˌrɒm.bəʊˈhiː.drən/A three-dimensional geometric figure with six faces, each of which is a rhombus.
rhomboid
adjectivenounC1
/ˈrɒm.bɔɪd/A quadrilateral with opposite sides equal and parallel, but with adjacent sides not equal and angles not right angles (a skewed parallelogram).
rhomboideus
nounVery Low
/rɒmˈbɔɪdɪəs/Either of two muscles (major and minor) in the upper back that connect the scapula to the vertebrae and are involved in retracting and rotating the scapula.
rhombus
nounC2
/ˈrɒmbəs/A flat shape with four equal straight sides, like a square pushed over to one side; a parallelogram with equal sides and opposite equal acute and obtuse angles.
rhonchus
nounVery Low
/ˈrɒŋkəs/A coarse, rattling sound heard in the airways during breathing, typically caused by secretions or obstructions.

Showing 3561–3580 of 5802 words.