leav·en·ing 
(lĕvə-nĭng)
(lĕvə-nĭng)n.
An agent that causes rising, fermentation, or ferment; leaven.
- prepense
- prepensely
- preponderance
- preponderancy
- preponderant
- preponderantly
- preponderate
- preponderately
- preponderation
- preposition
- preposition
- pre-position
- prepositional
- prepositionally
- prepositional phrase
- prepositive
- prepositively
- prepossess
- prepossessing
- prepossessingly
- prepossession
- preposterous
- preposterously
- preposterousness
- prepotency