Words that start with blue are written with Z.
EXAMPLES: blue, sugar, lily, tile, sugar, sulfur.
EXCEPTIONS: vacation, take over, take over business, assure, scare.
RULE No 2
Words that begin with zaf-, zam-, zap- are written with Z.
EXAMPLES: zafar, sapphire, zafarrancho, zafra, zambo, zambra, zampar, dive, shoe, slipper, zapote, zamba, zapata, cobbler, zamba ..
EXCEPTIONS: safari, samario, samaritan,, samurai, toad, sapiente, sapiencia, saponification.
RULE No 3
Words that begin or end with zoo (animal) are written with Z.
EXAMPLES: zoology, zoo, zoologist, zoonosis, zootechnics, zoophagus, zoophyte, zooplankton, sperm, metazoan, protozoan.
RULE No 4
Words that begin with zorr- and zurr- are written with Z.
EXAMPLES: fox, fox, fox, skunk, fox, spank, wallet, spank, cowhide, spaniel.
RULE No 5
Adjectives and nouns ending in az are written with Z.
EXAMPLES: Capable, fleeting, audacious, tenacious, suspicious, insightful, clever, deceitful, voracious, persistent, rapacious, mendacious, procacious, stubborn, truthful, agraz, truthful, agraz, foreman, face, mask, disguise, alcatraz, solace, haz