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English Words Starting With A

8,734 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)

arc tangent
nounLow
/ˌɑːk ˈtændʒənt/The inverse trigonometric function of tangent; the angle whose tangent is a given number.
arc welding
nounC1
/ɑːk ˈweldɪŋ/A welding process that uses an electric arc to generate heat to melt and join metals.
arc, d'
nounVery Low
/dɑːk/Prepositional contraction of 'de' + 'arc', appearing in the historical name 'Jeanne d'Arc' (Joan of Arc), meaning 'of Arc'.
arc-back
nounVery Low
/ˈɑːk ˌbæk/A sudden reversal of electrical current in a vacuum tube or gas discharge device, causing the current to flow backwards.
arc-boutant
nounRare
/ˌɑːk buːˈtɒ̃/A flying buttress—an external, arched masonry support that transfers thrust from a roof or vault to a separate buttress pier.
arc-jet engine
nounVery Low (Technical)
/ˈɑːk ˌdʒɛt ˈɛn.dʒɪn/A type of rocket engine that uses an electric arc to heat a propellant into plasma, which is then expelled through a nozzle to create thrust.
arca
nounC1
/ˈɑː.kə/A large, strong box or chest, typically made of wood and often reinforced with metal bands, used for storing valuables or treasures.
arcade
nounverb-transitiveB2
/ɑːˈkeɪd/A covered passageway or street, especially one with a series of arches supporting the roof, often lined with shops and serving as a public walkway.
arcade game
nounB1
/ɑːˈkeɪd ˌɡeɪm/A coin-operated entertainment machine, typically featuring video games or electromechanical games, originally housed in public arcades.
arcadia
nounC2
/ɑːˈkeɪ.di.ə/An idealised, harmonious, and peaceful rural region; a pastoral paradise.
arcadian
adjectivenounC2
/ɑːˈkeɪ.di.ən/relating to an idealised, peaceful, rural life; simple, pastoral, and idyllic.
arcadic
adjectivenounLow (literary/academic)
/ɑːˈkeɪ.dɪk/Relating to Arcadia, an idealized rustic region of ancient Greece, often representing a pastoral paradise of simplicity and natural harmony.
arcado-cyprian
nounVery Rare
/ˌɑː.keɪ.dəʊ ˈsɪp.ri.ən/A historical grouping of Ancient Greek dialects, encompassing the dialects of Arcadia in the Peloponnese and Cyprus.
arcady
nounLow-Frequency Literary
/ˈɑː.kə.di/An idealized, rustic, pastoral paradise; a region of perfect rural simplicity, peace, and contentment.
arcana
nounLow
/ɑːˈkeɪ.nə/Profound secrets or mysteries, especially those known only to the initiated.
arcanist
nounLow
/ˈɑː.kə.nɪst/A person who is expert in a specialized, secret, or esoteric body of knowledge; often specifically in the context of magic or alchemy.
arcanum
nounC2
/ɑːˈkeɪnəm/A secret, profound mystery, or hidden knowledge, especially of a spiritual, magical, or esoteric nature.
arcanum arcanorum
nounRare / Very Low Frequency
/ɑːˈkeɪnəm ˌɑːkəˈnɔːrəm/A secret of secrets; the most profound or ultimate mystery, often associated with esoteric knowledge.
arcaro
nounVery Low
/ɑːˈkɑːrəʊ/A surname of Italian origin, historically associated with the craft of archery or bow-making.
arcas
nounN/A
This word does not exist as a standard English word in mainstream dictionaries.

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