Formidableness
The Century Dictionary and Cyclopedia
noun.
The quality of being formidable, or adapted to excite dread.
the GNU version of the Collaborative International Dictionary of English
noun.
The quality of being formidable, or adapted to excite dread.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
The quality of being
formidable
.
Word Usage
"Generations of Soviet school children were taught that belief in God was a scientific absurdity, but apparently many remained unconvinced of the “formidableness” (is that a word) of knowledge to demolish belief in God."