1. What do the following words have in common?

BOUND

CUSTOM

DICTION

SECOND
GLOSS
VISION

2. What do the following words have in common?

ORES

ITCH

UTTER

AIRWAY

3. Making the same change to each word below will result in five new words:

BEND

SAGE

FLEX

WENT

EDIT

HINTS;

1. The same three letters can be added to each word.

2. The same two letters can precede each word.

3. The change involves the letter E in each word.

Answers:

1. Adding ARY to each word gives six new words:

BOUNDARY
CUSTOMARY
DICTIONARY 
SECONDARY
GLOSSARY
VISIONARY

2. Each word can be preceded by ST to give new words:

STORES
STITCH
STUTTER 
STAIRWAY

3. Changing each E to A creates new words:

BAND
SAGA
FLAX
WANT
ADIT