Browse by letter

English Words Starting With S

15,552 entries — pick a word to see its definition, pronunciation, and usage.

Filter

Parts of speech

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

superfluid
adjectivenounlow
/ˌsuːpəˈfluːɪd/A fluid, typically at very low temperatures, that flows without viscosity or internal friction, exhibiting zero resistance to flow.
superfluidity
nounC2
/ˌsuːpəfluˈɪdəti/A state of matter, typically liquid helium at very low temperatures, that flows without viscosity or friction.
superfluity
nounC2
/ˌsuːpəˈfluːɪti/An excessive and unnecessary amount of something; more than is needed.
superfog
nounVery Low
/ˈsuːpəfɒɡ/An extremely dense and dangerous fog created when smoke from wildfires mixes with moisture in the air, causing severely reduced visibility.
superfood
nounMedium-High
/ˈsuːpəfuːd/A food considered exceptionally beneficial for health and well-being due to its high concentration of nutrients, antioxidants, vitamins, or minerals.
superfund
nounLow frequency, specialized. Common in US environmental law, policy, and journalism; rare elsewhere.
/ˈsuːpəfʌnd/A US government program, established in 1980, designed to finance the cleanup of sites contaminated with hazardous substances and pollutants. The program's official name is the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
superfuse
verbverb-transitiveExtremely Rare / Technical
/ˈsuːpəfjuːz/To pour over, upon, or around.
supergalaxy
nounVery Low
/ˌsuːpəˈɡæləksi/An exceptionally large galaxy, or a cluster of galaxies that forms a larger structure.
supergiant
adjectivenounC1
/ˈsuːpədʒʌɪənt/A star of enormous size and luminosity, representing a late stage in stellar evolution, much larger than a giant star.
supergiant star
nounC2
/ˌsuː.pəˈdʒaɪ.ənt stɑː/An extremely large and luminous star of advanced stellar evolution, representing a brief but spectacular phase in a massive star's life cycle before potential supernova.
superglue
nounB2
/ˈsuːpəɡluː/An extremely strong, fast-drying adhesive, often based on cyanoacrylate.
supergovernment
nounC2
/ˌsuːpəˈɡʌv(ə)nmənt/A governing body or authority that exercises power over smaller or constituent governments; an overarching government.
supergrade
adjectivenounLow
/ˈsuːpəˌɡreɪd/Of or relating to a premium quality or classification, typically superior to standard grades.
supergranulation cell
nounVery Low
/ˌsuːpəˌɡrænjʊˈleɪʃən sel/A large-scale convection cell in the Sun's photosphere, forming a network of broad, gentle upflows surrounded by narrow downflows, typically about 30,000 km across.
supergraphics
nounC2 / Specialised
/ˈsuːpəˌɡræfɪks/Large-scale, bold graphic designs, murals, or typography painted or applied directly onto architectural surfaces, typically walls, floors, or ceilings, often using simple geometric shapes, vibrant colours, and oversized elements.
supergrass
nounC1/C2
/ˈsuːpəɡrɑːs/A criminal, especially one involved in organized crime, who gives the police a large amount of information about other criminals and their activities, often in exchange for immunity or protection.
supergravity
nounExtremely Rare / Technical
/ˌsuːpəˈɡrævɪti/A theoretical framework in physics that combines principles of supersymmetry with Einstein's theory of general relativity.
supergroup
nounB2
/ˈsuːpəɡruːp/A highly successful and prominent music group composed of members who were already famous as solo artists or as members of other successful bands.
superharden
verb-transitiveLow/Rare
/ˌsuːpəˈhɑːd(ə)n/To make an object or material extremely hard, typically through a specialized process.
superheat
nounverbverb-transitiveC2/Technical
/ˌsuːpəˈhiːt/, /ˌsjuːpəˈhiːt/To heat a substance, especially a liquid, to a temperature above its normal boiling point without it boiling.

Showing 14261–14280 of 15552 words.