Many verbs are formed from nouns and adjectives by adding en-, -en, -ize, etc to the endings of verbs.

Nouns Adjectives Verbs
  able enable
actor   act
bath   bathe
beauty   beautify
  broad broaden
  clean cleanse
cloth   clothe
courage   encourage
  dark darken
  deaf deafen
deed   do
description   describe
division   divide
  deep deepen
Nouns Adjectives Verbs
  equal equalize
  fast fasten
  fat fatten
  fertile fertilize
food   feed
friend   befriend
  full fill
  glad gladden
government   govern
health   heal
joy   enjoy
knee   kneel
  large enlarge
  less lessen
  light lighten
Nouns Adjectives Verbs
  long lengthen
  loose loosen
loss   lose
obedience   obey
pleasure   please
product   produce
proof   prove
public   publicize
  pure purify
  quick quicken
  rich enrich
  sad sadden
  safe save
sale   sell
satisfaction   satisfy
  sharp sharpen
  short shorten
Nouns Adjectives Verbs
sight   see
slave   enslave
  simple simplify
  smooth smoothen
  soft soften
song   sing
spark   sparkle
speech   speak
  strong strengthen
success   succeed
  sweet sweeten
tale   tell
thought   think
  tight tighten
trial   try
unity   unite
  wide widen
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