tower

Noun

• a powerful small boat designed to pull or push larger ships

• anything that approximates the shape of a column or tower
  • the test tube held a column of white powder
    
  • a tower of dust rose above the horizon
    
  • a thin pillar of smoke betrayed their campsite
    

• a structure taller than its diameter; can stand alone or be attached to a larger building

Verb

• appear very large or occupy a commanding position
  • The huge sculpture predominates over the fountain
    
  • Large shadows loomed on the canyon wall
    

Related words

• Synonyms: 
  tugboat , tug , towboat , column , pillar , loom , predominate , hulk