gatekeeper

1. Someone who controls access to something (synset 110141785)
   "there are too many gatekeepers between the field officers and the chief"
   is a type of: individual, mortal, person, somebody, someone, soul - a human being
2. Someone who guards an entrance (synset 110046278)
   is a type of: guard - a person who keeps watch over something or someone
   subtypes:

   • commissionaire - a uniformed doorman
   • night porter - a porter on duty during the night
   • ticket collector, ticket taker - someone who is paid to admit only those who have purchased tickets
   same as: door guard, doorkeeper, doorman, hall porter, ostiary, porter

Other Searches

• Rhyme: Dillfrog, RhymeZone
• Definition: Wiktionary, Dictionary.com, Wikipedia, Merriam-Webster, WordNet, Power Thesaurus
• Imagery: Google, Flickr, Bing