1. 
   Nph
   Naphtha (Abbreviation)
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   NPH
   NPH: Normal pressure hydrocephalus.
   Found op http://www.medterms.com/script/main/art.html?articlekey=8736
   
   
3. 
   NPH
   Naphtha
   Found op http://www.encyclo.co.uk/local/21049
   
   
4. 
   nph
   1) Naphtha
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/nph/1
   
   

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