How to spell NPD correctly?

If someone misspells "npd", they may have intended to type "NPD" which could stand for "Narcissistic Personality Disorder". Other possible correct suggestions could be "NDA" for "non-disclosure agreement" or "NPR" for "National Public Radio". It depends on the context of the misspelling.

• CPD Our company offers a variety of CPD courses to help professionals develop and enhance their skills.
• nd
• Ned
• nod She gave a nod to acknowledge his presence in the room.
• np
• NPR I like to listen to NPR in the morning while I'm getting ready for work.
• pd

Putrefication

• nitrification
• petrifaction
• purification
• putrefaction
• putrification
• vitrification