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document updated 16 years ago, on Feb 25, 2008
Words that are usually learned simultaneously, and are most easily understood when contrasted with the other. (either extrema on a continuum, or binary states)
law
de jure
/
de facto
linguistics
prescriptive
/
descriptive
proscribed / prescribed
exonym / endonym
medicine
acute
/
chronic
astronomy
apogee
/
perigee
periapsis/apoapsis; perihelion/aphelion; blah blah blah
zenith / nadir
(though
when these words are used outside the field
, apogee/perigee mean the same as this pair)