Found 5 full forms for WPNI
| Term | Full Form | Category |
|---|---|---|
| WPNI | Washington Post Newsweek Interactive 
| Others |
| WPNI | Washington Program in National Issues
| Others |
| WPNI | Washingtonpost.Newsweek Interactive
| Others |
| WPNI | Wet Pipe Nitrogen Inerting
| Others |
| WPNI | Whey Protein Nitrogen Index
| Others |