The List
There are 161 4 letter words with N as the first letter. The highest scoring is NIXY at 14 points in Scrabble. 1 carry three or more vowels, which makes them useful for dumping a vowel-clogged rack.
NAAMNAANNABENABKNABSNACHNADANADSNAFFNAGANAGSNAIFNAIKNAILNAINNALANAMENAMSNAMUNANANANENANGNANSNAOINAOSNAPANAPENAPSNARCNARDNARENARKNARYNATSNAVENAVYNAYSNAZENEALNEAPNEARNEATNEBSNECKNEDSNEEDNEEMNEEPNEFSNEGSNEIFNEKSNEMANEMNNENENEONNEPSNERDNERKNESHNESSNESTNETENETSNETTNEUKNEUMNEVENEVINEWSNEWTNEXTNGAINIBSNICENICKNIDENIDINIDSNIEDNIEFNIESNIFENIFFNIGHNILLNILSNIMBNIMSNINENIPANIPSNIRLNISHNISINITENITSNIXENIXYNOAHNOBSNOCKNODENODINODSNOELNOESNOGGNOGSNOILNOIRNOLENOLLNOLONOMANOMENOMSNONANONENONGNONINOOBNOOKNOONNOOPNOPENORINORKNORMNOSENOSHNOSYNOTANOTENOTTNOULNOUNNOUPNOUSNOUTNOVANOWLNOWNNOWSNOWTNOWYNOYSNUBSNUFFNUKENULLNUMBNUNSNURDNURLNURRNURSNUTSNYASNYEDNYES