pre·pro·fes·sion·al 
(prē′prə-fĕshə-nəl)
(prē′prə-fĕshə-nəl)adj.
Preparatory to the practice of a profession or to its specialized field of study.
- nitrify
- nitrifying bacterium
- nitrile
- nitrite
- nitro-
- nitrobacterium
- nitrobenzene
- nitrocellulose
- nitrocellulosic
- nitrochloroform
- nitrofuran
- nitrofurantoin
- nitrogen
- nitrogenase
- nitrogen balance
- nitrogen base
- nitrogen cycle
- nitrogen dioxide
- nitrogen fixation
- nitrogen-fixer
- nitrogen-fixing
- nitrogenize
- nitrogen mustard
- nitrogen narcosis
- nitrogenous