We found 26 dictionaries that define the word hardener:

General (16 matching dictionaries)

1. hardener: Merriam-Webster
2. hardener: Oxford Learner's Dictionaries
3. hardener: American Heritage Dictionary of the English Language
4. hardener: Collins English Dictionary
5. hardener: Wordnik
6. hardener: Wiktionary
7. hardener: Webster's New World College Dictionary, 4th Ed.
8. hardener: The Wordsmyth English Dictionary-Thesaurus
9. hardener: Infoplease Dictionary
10. Hardener, hardener: Dictionary.com
11. Hardener: Online Plain Text English Dictionary
12. hardener: Webster's Revised Unabridged, 1913 Edition
13. Hardener: AllWords.com Multi-Lingual Dictionary
14. hardener: Webster's 1828 Dictionary
15. hardener: FreeDictionary.org
16. hardener: TheFreeDictionary.com

Business (2 matching dictionaries)

17. Construction Term Glossary (No longer online)
18. hardener: Legal dictionary

Computing (1 matching dictionary)

19. hardener: Encyclopedia

Medicine (1 matching dictionary)

20. hardener: Medical dictionary

Miscellaneous (1 matching dictionary)

21. hardener: Idioms

Tech (5 matching dictionaries)

22. Book Binding (No longer online)
23. AUTOMOTIVE TERMS (No longer online)
24. Glossary of Composite Terms (No longer online)
25. K & A glossary (No longer online)
26. Hardener: Fiberglass Glossary

Definitions from Wiktionary (hardener) ▸ noun:  One who, or that which, hardens. ▸ noun:  A chemical substance added to something in order to harden it; used especially with paints, varnishes and resins. Similar: strengthener, heartener, fortifier, darkener, strengthner, softener, increaser, aggravator, heat treater, accelerator, more... Opposite: softener, weakening agent, decreaser Adjectives: liquid, separate, much, amine, successful, effective, concrete, special, potent, good, solid ▸ Words similar to hardener ▸ Usage examples for hardener ▸ Idioms related to hardener ▸ Wikipedia articles (New!) ▸ Popular adjectives describing hardener ▸ Words that often appear near hardener ▸ Rhymes of hardener ▸ Invented words related to hardener