Singular to Plural when a word ends in -y
Rule 1 - word ends vowel y - just add s
Rule 2 word ends consonant y - take off the y and put ies
baby – babies
buoy
– buoys
chimney
– chimneys
century
- centuries
daisy
– daisies
dictionary
– dictionaries
holiday
– holidays
monkey
– monkeys
mystery
- mysteries
story - stories