bathe
Couch
The longest is 5 letters: Flash, snarl
mammothbetroth
Ethic
Short.
hatch
"HUMAN"
chados
The only 5 letter word is 'phone'
The silent letters in the word "throat" are the 'h' and the 'a'.
The missing letters in "h t i me" are "a" and "s," forming the word "has time."
The longest possible word is only 5-letters long, 'HENNA'.