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7,153 words — headwords with part of speech, pronunciation, and a plain-language definition.

Allan-Herndon-Dudley syndrome
síndrome de Angelman
noun, feminine
Angelman syndrome
síndrome de Apert
noun, feminine
Apert syndrome
síndrome de Asperger
noun, masculine
Asperger's syndrome
síndrome de Down
noun, masculine
Down's syndrome / Down syndrome
síndrome de Estocolmo
noun, masculine
Stockholm syndrome
Guillain-Barré syndrome
Klinefelter syndrome
síndrome de Marfan
noun, masculine
Marfan syndrome
síndrome de Moebius
noun, feminine
Moebius syndrome
Münchausen syndrome
Peter Pan syndrome
síndrome de Tourette
noun, masculine
Tourette's syndrome
síndrome de Turner
noun, masculine
Turner syndrome
abstinence syndrome
locked-in syndrome
acquired immune deficiency syndrome
restless legs syndrome
irritable bowel syndrome
carpal tunnel syndrome
premenstrual syndrome, PMS
sínfisis
noun, feminine
symphysis
sínfito
noun, masculine
sawfly
sínico
adjective
Sinic; Chinese
sínodo
noun, masculine
synod
sínople
noun, masculine
alternative spelling of sinople
síntesis
noun, feminine
synthesis; summary
síntoma
noun, masculine
symptom (indicators and characteristics of the presence of something else)
withdrawal symptom
síp
interjection
yup or yep
síper
noun, masculine
zipper; zip fastener
síquico
adjective
alternative spelling of psíquico
sírfido
noun, masculine
hoverfly
seismically
sísmico
adjective
seismic (relating to earthquakes)
sístole
noun, feminine
systole (contraction of the heart)
sítula
noun, feminine
situla
sódico
adjective
sodium
sófbol
noun, masculine
synonym of sóftbol
sófora
noun, feminine
pagoda tree (Styphnolobium japonicum)
sóftbol
noun, masculine
softball
sóleo
noun, masculine
soleus (muscle)
solidly
sólido
noun, masculine
solidus
sólido
noun, masculine
solid
sólido
adjective
solid; strong, firm
sólido arquimediano
noun, masculine
Archimedean solid
sólido de Arquímedes
noun, masculine
Archimedean solid
sólido platónico
noun, masculine
Platonic solid
sólito
adjective
accustomed, used to
sólo
adverb
superseded spelling of solo
sonically
sónico
adjective
sonic
sórabo
adjective
Sorbian
sórbico
adjective
sorbic
sórdido
adjective
sordid, sleazy, seamy, dirty; greedy
sótano
noun, masculine
cellar; basement; pit
sóviet
noun, masculine
soviet (an assembly, convocation, or council of workers)
súbdito
adjective
subject
súbdito
noun, masculine
subject (citizen in a monarchy or person ruled over by another); underling, minion