We found 10 dictionaries that define the word preventiveness:

General (6 matching dictionaries)

1. preventiveness: Merriam-Webster
2. preventiveness: Collins English Dictionary
3. preventiveness: Wordnik
4. preventiveness: Wiktionary
5. preventiveness: Dictionary.com
6. preventiveness: TheFreeDictionary.com

Business (1 matching dictionary)

7. preventiveness: Legal dictionary

Computing (1 matching dictionary)

8. preventiveness: Encyclopedia

Medicine (2 matching dictionaries)

9. preventiveness: Merriam-Webster Medical Dictionary
10. preventiveness: Medical dictionary

(Note: See preventive as well.)

Definitions from Wiktionary (preventiveness) ▸ noun:  The quality of being preventive. Similar: preventableness, protectiveness, preventability, precautiousness, protectivity, unpreventableness, prehensiveness, prohibitiveness, curativeness, unpreventability, more... Opposite: reactiveness, responsiveness, proactiveness ▸ Words similar to preventiveness ▸ Usage examples for preventiveness ▸ Idioms related to preventiveness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing preventiveness ▸ Words that often appear near preventiveness ▸ Rhymes of preventiveness ▸ Invented words related to preventiveness