# NDC vs non

> English confusable word pair

## The two words

### NDC
*noun · frequency rank #46,084*
Initialism of negative differential conductance.

### non
*adverb · IPA /nɑn/ · frequency rank #515*
Obsolete form of none.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/ndc-vs-non