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English Words Starting With S

15,552 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)

subspecies
nounLow (C2)
/ˈsʌbˌspiːʃiːz/A taxonomic rank below species, grouping populations of a species that are distinct but still capable of interbreeding.
substage
nounC2
/ˈsʌb.steɪdʒ/A secondary or subordinate stage within a larger process, phase, or developmental period.
substance
nounC1
/ˈsʌbstəns/A particular type of solid, liquid, or gas; matter with specific physical and chemical properties.
substance abuse
nounC1
/ˈsʌbstəns əˌbjuːs/The harmful or hazardous use of psychoactive substances, including alcohol and illicit drugs.
substance p
nounLow in general language, but common in scientific and medical contexts.
/ˈsʌbstəns piː/A neuropeptide that acts as a neurotransmitter and neuromodulator, primarily involved in pain perception and inflammatory responses.
substantia nigra
nounLow
/səbˌstænʃə ˈnaɪɡrə/A region of the midbrain containing dark‑pigmented nerve cells that produce dopamine.
substantial
adjectivenounC1
/səbˈstænʃl/Large in size, value, or importance; having a solid, firm, or significant nature.
substantialism
nounVery low
/səbˈstænʃəlɪzəm/The philosophical doctrine that substance is the fundamental reality, independent of its properties or relations.
substantialize
verbVery Low (Formal/Literary)
/səbˈstæn.ʃə.laɪz/To make something real, concrete, or material; to give physical form or substance to an idea or concept.
substantiate
verbverb-transitiveC1/C2 (Advanced)
/səbˈstæn.ʃi.eɪt/To provide evidence or proof to support a claim, statement, or theory, making it more concrete or verified.
substantiated
adjectiveverbMedium
/səbˈstænʃieɪtɪd/Provided with evidence or proof to support a claim.
substantiation
nounMedium
/səbˌstænʃiˈeɪʃən/The act of providing evidence or proof to support a claim or statement.
substantive
adjectivenounC1
/ˈsʌbst(ə)ntɪv/Having a firm basis in reality; important, meaningful, or considerable. Also, a word that functions as a noun.
substantive agreements
plural-nounC2
/səbˈstæn.tɪv əˈɡriː.mənts/Formal, binding agreements that address the essential and significant terms of a deal, contract, or negotiation.
substantive rank
nounC2
/səbˈstan.tɪv ˈræŋk/A permanent, confirmed grade or position within an organizational hierarchy, especially in the military, civil service, or police, as opposed to a temporary or acting position.
substantive right
nounC1/C2
/ˈsʌbstəntɪv ˌraɪt/A right that is fundamental, inherent, and enforceable in itself, not merely a procedural or temporary claim.
substantivize
verbverb-transitiveLow
/səbˈstæntɪvaɪz/To convert a word or phrase into a noun.
substation
nounC1
/ˈsʌbˌsteɪ.ʃən/A secondary station or installation that receives and transforms electrical power from a main generating station for local distribution.
substituent
adjectivenounC2
/səbˈstɪtʃuənt/An atom or group of atoms that replaces another atom or group in a molecule.
substitute
adjectivenounverb+2B2
/ˈsʌbstɪtjuːt/A person or thing that takes the place or performs the function of another.

Showing 13561–13580 of 15552 words.