Here are a couple examples of vocabulary words starting with F:
Famished is a word for extremely hungry that starts with the letter F.
friendly bob
funny
"Pressure" is an 8-letter word related to force that starts with the letter "f."
The 8-letter "f" word in science that means force is "friction."
A five (5) letter word that starts with Z and ends with F, there is none recorded. However, there is a word that starts with Z and ends with F. The word is a four (4) letter word: zarf, (noun) a metal holder for a coffee cup.
Forest
Feathers
funny
falloff
Fireproof Foolproof
fuss