lonesome in WordNet English dictionary

1. being the only one; single and isolated from others
   "the lone doctor in the entire county"; "a lonesome pine"; "an only child"; "the sole heir"; "the sole example"; "a solitary instance of cowardice"; "a solitary speck in the sky"
   lone  lonesome  only  sole  solitary 
   
2. marked by dejection from being alone
   "felt sad and lonely"; "the loneliest night of the week"; "lonesome when her husband is away"; "spent a lonesome hour in the bar"
   lonely  lonesome