ABLE
ENABLE
HIGH
HEIGHTEN
COURAGE
ENCOURAGE
CLOSE
ENCLOSE
DEAF
DEAFEN
QUICK
QUICKEN
BAD
WORSEN
DANGER
ENDANGER
SICK
SICKEN
LARGE
ENLARGE
SMART
SMARTEN
QUIET
QUIETEN
DAMP
DAMPEN
LIGHT
LIGHTEN
RICH
ENRICH
STIFF
STIFFEN
SAD
SADDEN
SURE
ENSURE
FORMULA
FORMULATE
AWAKE
WAKEN
IMMIGRANT
IMMIGRATE
LOOSE
LOOSEN
EMIGRATION
EMIGRATE
STRONG
STRENGTHEN