Vigil
Viral
Vital
Vocal
Vowel
... to name but a few.
Unfix is a 5 letter word. It begins with U and ends with X.
Latex is a 5 letter word. It begins with L and ends with X.
blurb
Guano
juice
index
That would be quota.
lasik
EagerEaterElderEnterErrorEsperEuler
ichor, infer, inter
light, legit
* bluff * brief