codex
telex, Essex, FedEx, index
There are five syllables. Ex-is-ten-tial-ism.
"Exploratory" has five syllables. The word can be divided into syllables as ex-plor-a-to-ry.
exubaran
extinguish
exit
Five Un-ex-plain-a-ble
extra
I don't think there is one
Yes. It is the spelling for the letter X.
Exacto
5 ex-am-i-na-tion