Usually after “short” vowels.
bell bill cull dell dill doll dull fell fill gill gull hell hill hull ill Jill kill mill moll mull Nell null Pell pill poll tell till toll well will yell |
chill drill droll dwell frill grill krill prill quill scull shall shell shrill skill skull smell spell spill still swell swill thrill trill troll twill |
allied allot allow alloy ally Apollo atoll ballot befell bellow belly billet billow billy brolly bullet bully callow cellar chilly collar collie cullet dally dollar dollop dolly enroll (US) fallow fellow fillet fillip filly follow folly frilly fuller fully galley gallic gallon gallop golly gullet gully hello holler hollow holly mellow silly telly |