English Words Starting With S

• synechia

  nounRare/Very Low Frequency
  /sɪˈniːkɪə/An abnormal adhesion or fusion of body parts, particularly referring to the eye (iris to cornea or lens) or, in medical contexts, other organs.
• synechism

  nounVery Rare
  /ˈsɪnɪkɪzəm/The philosophical doctrine that continuity is a fundamental principle of the universe.
• synecology

  nounC2
  /ˌsɪnɪˈkɒlədʒi/The branch of ecology that deals with the ecological relationships between entire communities of organisms and their environment.
• synectics

  nounVery low
  /sɪˈnɛktɪks/A formalised approach to creative problem-solving that uses metaphorical thinking and structured group collaboration.
• synectics group

  nounLow / Technical
  /sɪˈnɛktɪks ɡruːp/A facilitated team or structured session using the synectics methodology, which employs analogical thinking and metaphorical processes to solve problems creatively.
• syneresis

  nounC2
  /sɪˈnɪərɪsɪs/The contraction of two vowels or syllables into one, especially the running together of two vowels in a word without forming a diphthong; also, in chemistry/medicine, the exudation of liquid from a gel.
• synergid

  nounVery Low
  /sɪˈnɜː.dʒɪd/One of two small, short-lived cells in the embryo sac of a flowering plant, located adjacent to the egg cell, that help guide the pollen tube for fertilisation.
• synergism

  nounC2
  /ˈsɪnədʒɪz(ə)m/The interaction or cooperation of two or more elements to produce a combined effect greater than the sum of their separate effects.
• synergist

  adjectivenounC2
  /ˈsɪnədʒɪst/An agent, substance, or muscle that works with another to produce a combined effect greater than the sum of their separate effects.
• synergy

  nounC1
  /ˈsɪnədʒi/The extra benefit or effect produced when two or more people, groups, or things work together, which is greater than the sum of their individual efforts or effects.
• synesis

  nounC2+
  /ˈsɪnɪsɪs/A grammatical construction where the agreement of words is based on meaning rather than strict formal syntax (e.g., treating a collective noun as plural based on the sense of the group's members).
• synesthesia

  nounC2
  /ˌsɪnɪsˈθiːzɪə/A neurological phenomenon where stimulation of one sensory pathway leads to automatic, involuntary experiences in another sensory pathway.
• synfuel

  nounC1
  /ˈsɪnfjuːəl/A liquid or gaseous fuel derived from a source other than natural crude oil, typically through chemical processes like gasification or Fischer-Tropsch synthesis.
• syngamy

  nounC2 (Very Low Frequency)
  /ˈsɪŋɡəmi/The fusion of two gametes in sexual reproduction to form a zygote.
• syngas

  nounLow
  /ˈsɪnɡæs/A fuel gas mixture consisting primarily of hydrogen and carbon monoxide, produced by gasification of carbon-containing materials.
• synge

  nounC1
  /sɪndʒ/To burn the surface of something slightly without setting it fully on fire.
• syngenesis

  nounC2/Professional
  /sɪnˈdʒɛnɪsɪs/The process of simultaneous or associated origin; reproduction involving the union of gametes or their nuclei.
• syngraft

  nounRare / Technical
  /ˈsɪnɡrɑːft/A tissue graft transplanted between genetically identical individuals.
• synizesis

  nounRare / C2
  /ˌsɪnɪˈziːsɪs/A linguistic and poetic phenomenon where two adjacent vowel sounds within a single syllable are pronounced together, often creating a diphthong or a glide, especially to meet metrical requirements.
• synkaryon

  nounVery Low
  /sɪnˈkærɪən/A nucleus formed by the fusion of two nuclei, especially during fertilization, resulting in a single nucleus containing chromosomes from both parent cells.

Showing 15401–15420 of 15552 words.