bathe
Couch
The longest is 5 letters: Flash, snarl
mammothbetroth
Ethic
Short.
hatch
"HUMAN"
chados
The silent letters in the word "throat" are the 'h' and the 'a'.
The only 5 letter word is 'phone'
The silent letters in the word "phthistic" are "p," "h," and the first "t."
redhead