There is no Incan word that starts with the letter x. X is not a letter in the Incan language.
A word that starts with S and ends with X is sphinx.
westward expansion that starts with the letter x
xylophone
there is no filipino word that starts with letter x unless if you will ask about filipino slang words that starts with letter x.
X-rays
Outbox is a six letter word that starts with o and ends with x. Outfox is another word.
xerox
xis
No word starting with the letter y contains the letter x.
xenos
The letter "x" does not exist in Arabic or any of the Ancient Egyptian languages, as a result, there is no Egyptian word that starts with "x".