there is no filipino word that starts with letter x unless if you will ask about filipino slang words that starts with letter x.
xylophone
The Filipino value system is summarized in single words in the Filipino language: words like bahala na, pakiksama, ningas cogon - translated as resignation, group loyalty, procrastination. However,they do not seem to be strictly limited to a number of 16.
X-ray
timezonetimesharetimeworntimekeepertimetabletimeouttimepiecetimestamps
there is no such word
Xylophone
No they do not
Calamansi
none
There is no Filipino word that starts with letter Z. Maybe you can use colloquial words though.
salbahe sungit sira sobra
x chromosones
x-ray!
The biology words that starts with x are xylem and xyloid.
xylophone
Yes, though it's only used in foreign words.
There are no English words that start with X and rhyme with window.