Fall down and Slip-up

Fall down verb - Lose an upright position suddenly.

Slip-up and fall down are semantically related. In some cases you can replace phrase "Slip-up" with "Fall down", this terms are similar.

Slip-up noun - A minor inadvertent mistake usually observed in speech or writing or in small accidents or memory lapses etc..

Fall down and slip-up are semantically related. Sometimes you can use "Fall down" instead a verb phrase "Slip-up".