失速速度

しっそくそくど

stalling speed

旋回失速

せんかいしっそく

rotating stall

失

loss (of something); disadvantage

速

そく

gear, speed (as in 4 speed automatic transmission and such)

速度 / 速さ

そくど / はやさ

velocity

失当

しっとう

injustice, impropriety, unreasonableness

失費

しっぴ

expenses

失行

しっこう

(ethical) mistake

失言

しつげん

verbal gaffe, verbal slip, slip of the tongue, using improper words

失投

しっとう

careless pitch

失火

しっか

accidental fire, fire caused by negligence

失命

しつめい

losing one's life, dying

漂失

ひょうしつ

drifting away (and going lost)

失血

しっけつ しつち

loss of blood

失明

しつめい

loss of eyesight

失保

しつほ

unemployment insurance

失語

しつご

forgetting the words, inability to pronounce a word correctly

流失

りゅうしつ

washed away

失政

しっせい

misgovernment