verb (v)

• to come or go into(verb.motion)

  Example:
  The boat entered an area of shallow marshes.
  

  Synonym:
  come in, get in, get into, go in, go into, move into
  Antonym:
  exit, get out, go out, leave
  

  source: wordnet30
• become a participant; be involved in(verb.competition)

  Example:
  Enter a race.
  Enter an agreement.
  Enter a drug treatment program.
  Enter negotiations.
  

  Synonym:
  participate
  Antonym:
  chuck up the sponge, drop by the wayside, drop out, fall by the wayside, give up, quit, throw in, throw in the towel
  

  source: wordnet30
• register formally as a participant or member(verb.social)

  Synonym:
  enrol, enroll, inscribe, recruit
  

  source: wordnet30
• be or play a part of or in(verb.stative)

  Synonym:
  figure
  

  source: wordnet30
• make a record of; set down in permanent form(verb.communication)

  Synonym:
  put down, record
  

  source: wordnet30
• come on stage(verb.creation)

  source: wordnet30
• take on duties or office(verb.social)

  Synonym:
  accede
  

  source: wordnet30
• put or introduce into something(verb.contact)

  Synonym:
  infix, insert, introduce
  

  source: wordnet30
• set out on (an enterprise or subject of study)(verb.change)

  Synonym:
  embark
  

  source: wordnet30
• To come or go into; to pass into the interior of; to pass within the outer cover or shell of; to penetrate; to pierce; as, to enter a house, a closet, a country, a door, etc.; the river enters the sea.(verb)

  source: webster1913
• To go or come in; -- often with in used pleonastically; also, to begin; to take the first steps.(verb)

  source: webster1913