- believe
- pier
- field
- niece
- piece
- relieve
- belief
- wield
- achieve
- pierce
- retrieve
- relief
- yield
- brief
- bier
- siege
- fiend
- grief
Observe also: financier, friend, sieve.
708. Nouns ending in a vowel and -y form the plural by adding -s.
- days
- boys
- chimneys
- valleys
709. Verbs ending in a vowel and -y form the third person singular, present indicative, by adding -s.
- lays
- enjoys
- employs
710. Nouns ending in a consonant and -y form the plural by changing the -y to -i and adding -es.
- fly, fli-es
- sky, ski-es
- lady, ladi-es
711. Many nouns ending in -f or -fe form the plural in -ves.
- wolf, wolves
- self, selves
- life, lives
- half, halves
- leaf, leaves
- wife, wives
- calf, calves
- loaf, loaves
- knife, knives