We found 17 dictionaries that define the word perniciousness:

General (13 matching dictionaries)

1. perniciousness: Merriam-Webster
2. perniciousness: Oxford Learner's Dictionaries
3. perniciousness: Collins English Dictionary
4. perniciousness: Vocabulary.com
5. perniciousness: Wordnik
6. perniciousness: Wiktionary
7. perniciousness: Dictionary.com
8. Perniciousness: Wikipedia, the Free Encyclopedia
9. perniciousness: Rhymezone
10. perniciousness: Webster's 1828 Dictionary
11. perniciousness: FreeDictionary.org
12. perniciousness: Mnemonic Dictionary
13. perniciousness: TheFreeDictionary.com

Business (1 matching dictionary)

14. perniciousness: Legal dictionary

Computing (1 matching dictionary)

15. perniciousness: Encyclopedia

Medicine (2 matching dictionaries)

16. perniciousness: Merriam-Webster Medical Dictionary
17. perniciousness: Medical dictionary

(Note: See pernicious as well.)

Definitions from Wiktionary (perniciousness) ▸ noun:  The condition of being pernicious; destructiveness Similar: toxicity, destructiveness, destructivity, deleteriousness, detrimentalness, nefariousness, pestiferousness, pestilentialness, maliciousness, pervicaciousness, more... Opposite: beneficence, helpfulness, goodness ▸ Words similar to perniciousness ▸ Usage examples for perniciousness ▸ Idioms related to perniciousness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing perniciousness ▸ Words that often appear near perniciousness ▸ Rhymes of perniciousness ▸ Invented words related to perniciousness