Hayai, Hayai and Osoi - Meaning in Japanese

First, the one we already know:

• hayai 速い
  To be fast. To be quick.

Now some speed levels.

• sokudo 速度
  Speed. Speed level. How fast something is.
• kousoku 高速
  High speed.
• teisoku 低速
  Low speed.
• Speed learning.
• onsoku 音速
  Speed of sound.
• kousoku 光速
  Speed of light.

And then, some words to do things... fast.

• sokutatsu 速達
  Express delivery.
• sokketsu 速決
  Fast decision. Rash decision.
• sokudoku 速読
  Quick reading.
• sokkou  速攻
  Quick attack.
• sokkou 速効
  Quick effect.
• sokushuu 速習

Hayai 早い

Again, the word we already know:

• hayai 早い
  Early. To be early.

And then we have these adverbs withtwo hayai instead of one.

• sassoku 早速
  To do it now or soon. Let's go
• hayahaya 早々
  To do soon.

Then we have these words about the time of the day.

• souchou 早朝
  Early in the morning.
• souban 早晩
  Early or late. Morning or evening. Eventually.

And finally these about doing things early.

• hayaoki 早起き
  Wake up early.
• hayane 早寝
  Go sleep early.
• soutai 早退
  Leave early, or earlier than normal.

Osoi 遅い

First the word we already know, which has two meanings, as we already know.

• osoi 遅い
  Slow or late.

Then some antonyms for hayai 速い.

• titatsu 遅達
  Delayed delivery. Late delivery.
• tishinji 遅進児
  Child that learns slowly.
  (literally "child that advances slowly")
• tikou 遅行
  Delayed effect. Slow effect.

Then some antonyms for hayai 早い.

• okureru 遅れる
  To be late. To delay.
• okure 遅れ
  A delay. Lag..
• osojimai 遅じまい
  To close late. (a shop, etc.)
• osoku naru 遅くなる
  To be for later. To do something later.
• tikoku 遅刻
  To be late somewhere. To get there after the right time. (school, etc.)
• tiharai 遅払い
  Late pay. Delayed pay.