shirabe.org
1)

高卒こうそつ

#36,718
Common
こうそつ
Meaning
    1. having graduated from high school (as one's highest completed level of education); high school graduate
      abbr. of 高等学校卒業（者）
      僕ぼく高卒こうそつだからそのぶん高校こうこうの問題もんだいとか出来できる。
      I'm a high school graduate so I am that much able to answer high school problems and such.
Kanji
高 コウ tall, high, expensive 卒 ソツ graduate, soldier, private
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2)

高卒認定試験こうそつにんていしけん

#120,821
こうそつにんていしけん
Meaning
    1. Certificate for Students Achieving the Proficiency Level of Upper Secondary School Graduates; Japanese high-school equivalency examination
      See also: 高等学校卒業程度認定試験 (こうとうがっこうそつぎょうていどにんていしけん)
Kanji
高 コウ tall, high, expensive 卒 ソツ graduate, soldier, private 認 ニン acknowledge, witness, discern 定 テイ determine, fix, establish 試 シ test, try, attempt 験 ケン verification, effect, testing
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