We found 17 dictionaries that define the word spontaneousness:

General (13 matching dictionaries)

1. spontaneousness: Merriam-Webster
2. spontaneousness: Collins English Dictionary
3. spontaneousness: Vocabulary.com
4. spontaneousness: Wordnik
5. spontaneousness: Wiktionary
6. spontaneousness: Dictionary.com
7. spontaneousness: Rhymezone
8. spontaneousness: Webster's 1828 Dictionary
9. spontaneousness: FreeDictionary.org
10. spontaneousness: Mnemonic Dictionary
11. spontaneousness: TheFreeDictionary.com

Business (1 matching dictionary)

12. spontaneousness: Legal dictionary

Computing (1 matching dictionary)

13. spontaneousness: Encyclopedia

Medicine (2 matching dictionaries)

14. spontaneousness: Merriam-Webster Medical Dictionary
15. spontaneousness: Medical dictionary

(Note: See spontaneous as well.)

Definitions from Wiktionary (spontaneousness) ▸ noun:  The state or condition of being spontaneous; spontaneity. Similar: spontaneity, unspontaneousness, unspontaneity, semispontaneity, unstudiedness, randomicity, sporadicalness, extemporaneousness, unexpectedness, randomity, more... Adjectives: such, very, absolute, fresh, simple, blank, moral, eager, sacred, blithe, sublime ▸ Words similar to spontaneousness ▸ Usage examples for spontaneousness ▸ Idioms related to spontaneousness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing spontaneousness ▸ Words that often appear near spontaneousness ▸ Rhymes of spontaneousness ▸ Invented words related to spontaneousness