How many words start with NER?

10, from 5 letters up to 5. All of them are on this page.

What is the highest scoring word that start with NER?

NERTZ at 14 points in Scrabble, and NERTZ at 15 in Words With Friends, because the two games score the tiles differently.

NERAL, NERDS, NERDY, NERKA, NERKS, NEROL, NERTS, NERTZ, NERVE, NERVY.

10 of them: NERAL, NERDS, NERDY, NERKA, NERKS, NEROL, NERTS, NERTZ, NERVE, NERVY.

There are 10 of them. The highest scoring is NERTZ at 14 points in Scrabble, and the set averages 8.1.

Most common words first, then the rest A to Z.

The most familiar words on this page and what they mean. Tap any word for its full entry, score and anagrams.

NERVE noun any bundle of nerve fibers running to various organs and tissues of the body
NERDS noun form of NERD: an insignificant student who is ridiculed as being affected or boringly studious
NERVY adjective being in a tense state

Definitions from Open English WordNet, CC BY 4.0.

All of them: Word lists.