inertia vs oomph

inertia

noun
  • Lack of activity; sluggishness; said especially of the uterus, when, in labour, its contractions have nearly or wholly ceased. 

  • In a person, unwillingness to take action. 

  • The property of a body that resists any change to its uniform motion; equivalent to its mass. 

oomph

noun
  • A bassy grunting or thudding sound. 

  • Strength, power, passion or effectiveness; clout. 

  • Sex appeal. 

verb
  • To produce a bassy grunting or thudding sound. 

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