Minimal Pairs

/s/ (voiceless alveolar fricative)   and   /z/ (voiced alveolar fricative)
sipzip
Suezoo
saidZed
sealzeal
iceeyes
ricerise
licelies
priceprize
dicedies
gracegraze
facephase
macemaze
lacelaze
placeplays
busbuzz
nieceknees
peaspeas
piercepeers
fiercefears
looselose