high-power vs mightly

high-power

adj

  • Synonym of high-powered 

mightly

adj

  • Mighty; competent; capable; strong; powerful. 

  • Substantial; weighty; of import. 

  • Able; able to occur; possible. 

adv

  • Very. 

  • Mightily. 

How often have the words high-power and mightly occurred in a corpus of books? (source: Google Ngram Viewer )