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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)

resorcinol
nounLow
/rɪˈzɔːsɪnɒl/A colourless crystalline organic compound used in resins, dyes, antiseptics, and pharmaceuticals.
resorcinolphthalein
nounVery Low
/rɪˌzɔːsɪnɒlˈθæliːn/A synthetic chemical compound, specifically a phthalein dye derived from resorcinol, used as an indicator.
resorption
nounC2
/rɪˈzɔːpʃən/The process by which a substance, tissue, or structure is broken down and absorbed back into the body or surrounding medium.
resort
nounverbverb-intransitiveB2
/rɪˈzɔːt/to turn to something as a course of action when in difficulty.
resorter
nounC2/Rare
/rɪˈzɔːtə/A person who travels to and stays at a place, typically a holiday destination, for recreation.
resound
verbverb-intransitiveverb-transitiveC1
/rɪˈzaʊnd/To fill a place with a loud, echoing, and often prolonged sound.
resource
nounB2
/rɪˈzɔːs/A supply of something (e.g., money, materials, staff) that is available for use or can be drawn upon when needed; an available means to achieve an end.
respawn
adjectiveverb-intransitiveLow-medium
/ˌriːˈspɔːn/In video games, to reappear or regenerate in the game world after a character has died or been defeated.
respect
nounverbverb-transitiveB1 (Common)
/rɪˈspɛkt/A feeling of deep admiration for someone or something elicited by their abilities, qualities, or achievements; due regard for the feelings, wishes, or rights of others.
respectability
nounC1
/rɪˌspɛktəˈbɪlɪti/The quality of being considered socially acceptable, proper, and decent according to conventional standards.
respectability politics
nounLow-medium (C1-C2)
/rɪˌspɛktəˈbɪlɪti ˈpɒlɪtɪks/The conscious adoption of behaviors, aesthetics, or values believed to project dignity, propriety, and acceptance within mainstream society, often as a strategy for marginalized groups to gain social standing or deflect prejudice by conforming to dominant norms.
respecter
nounC1
/rɪˈspɛktə/A person or thing that shows respect or consideration for something.
respell
verb-transitiveLow
/ˌriːˈspɛl/To spell a word again, often in a different way or using a different system.
respighi
nounLow
/rɛˈspiːɡi/The surname of the 20th-century Italian composer Ottorino Respighi, known for his orchestral tone poems.
respiration
nounC1
/ˌrɛspɪˈreɪʃ(ə)n/The physical process of breathing, involving the inhaling of oxygen and exhaling of carbon dioxide.
respirator
nounB2
/ˈrɛspəreɪtə/A device worn over the nose and mouth to protect the wearer from inhaling harmful substances or to assist breathing.
respiratory chain
nounLow
/ˈrɛspərət(ə)ri tʃeɪn/A series of protein complexes and electron carriers in mitochondria that transfer electrons and generate ATP through oxidative phosphorylation.
respiratory distress syndrome
nounLow
/ˈrɛsp(ə)rət(ə)ri dɪˈstrɛs ˈsɪndrəʊm/A serious medical condition, typically affecting newborns or adults with lung injury, characterized by severe difficulty breathing and insufficient oxygen in the blood.
respiratory failure
nounC2
/ˈrɛsp(ə)rət(ə)ri ˈfeɪljə/A serious medical condition in which the respiratory system fails in its gas exchange function, resulting in low oxygen levels (hypoxemia) and/or high carbon dioxide levels (hypercapnia) in the blood.
respiratory quotient
nounLow
/ˈrɛspɪrət(ə)ri ˈkwəʊʃənt/The ratio of the volume of carbon dioxide produced to the volume of oxygen consumed in a given period of respiration.

Showing 2921–2940 of 5802 words.