companion

Noun

• one paid to accompany or assist or live with another

• a traveler who accompanies you

• a friend who is frequently in the company of another
  • drinking companions
    
  • comrades in arms
    

Verb

• be a companion to somebody

Related words

• Synonyms: 
  fellow traveler , fellow traveller , comrade , fellow , familiar , associate , company , accompany , keep company