strong vs substantial

strong

adj
  • Having wealth or resources. 

  • Highly stimulating to the senses. 

  • Having an offensive or intense odor or flavor. 

  • Having a high concentration of an essential or active ingredient. 

  • Having a specified number of people or units. 

  • Severe; very bad or intense. 

  • Having a wide range of logical consequences; widely applicable. (Often contrasted with a weak statement which it implies.) 

  • Capable of producing great physical force. 

  • Inflecting in a different manner than the one called weak, such as Germanic verbs which change vowels. 

  • Determined; unyielding. 

  • Having a high alcoholic content. 

  • Not easily subdued or taken. 

  • Impressive, good. 

  • That completely ionizes into anions and cations in a solution. 

  • Convincing. 

  • Having a lot of power. 

  • Capable of withstanding great physical force. 

adv
  • In a strong manner. 

substantial

adj
  • Possessed of goods or an estate; moderately wealthy. 

  • Most important; essential. 

  • Not imaginary; real; actual; true; veritable. 

  • Having a substance; actually existing. 

  • Corporeal; material; firm. 

  • Satisfying; having sufficient substance to be nourishing or filling. 

  • Large in size, quantity, or value; ample; significant. 

  • Having good substance; strong; stout; solid; firm. 

noun
  • Anything having substance; an essential part. 

How often have the words strong and substantial occurred in a corpus of books? (source: Google Ngram Viewer )