verbs Y: * yell * yammer * yank * yawn * yearn * yield (to produce a result)
When a suffix is added to a word ending in a consonant the y changes to an I.
yummy
Anatomy, archery
bravery
yacketyyak
actually activity acrimony
balcony
custody calumny
ApologyOthers include:abilityacidityactuaryagilityallergyamenityamiablyanalogyanatomyanchovyangrilyanomalyatrophy
Yule and yoke
How about "density"?
It is every.