The List
There are 661 7 letter words with N as the first letter. The highest scoring is NUZZLED at 26 points in Scrabble. 1 of them contain no vowel at all: NYMPHLY.
NAARTJENABBERSNABBINGNACARATNACELLENACKETSNACRITENACROUSNADIRALNAEBODYNAEVOIDNAFFESTNAFFINGNAGANASNAGAPIENAGARISNAGGERSNAGGIERNAGGINGNAGMAALNAIADESNAIFESTNAILERSNAILERYNAILINGNAILSETNAIVELYNAIVESTNAIVETENAIVETYNAIVISTNAKEDERNAKEDLYNALLAHSNAMABLENAMASTENAMETAGNAMINGSNANCIESNANDINANANDINENANDINSNANDOOSNANISMSNANITESNANKEENNANKINSNANNIEDNANNIESNANOBESNANOBOTNANODOTNANOOKSNAPALMSNAPHTHANAPHTOLNAPKINSNAPLESSNAPOOEDNAPPERSNAPPIERNAPPIESNAPPINGNAPRONSNARASESNARCEENNARCEINNARCISMNARCISTNARCOMANARCOSENARDINENARDINGNARDOOSNARGILENARGILYNARKIERNARKINGNARRATENARROWSNARTHEXNARTJIENARWALSNARWHALNASALLYNASARDSNASCENTNASHGABNASIONSNASTIERNASTIESNASTILYNASUTESNATCHESNATHEMONATIONSNATIVESNATRIUMNATRONSNATTERSNATTERYNATTIERNATTILYNATURAENATURALNATUREDNATURESNAUCHESNAUGHTSNAUGHTYNAUPLIINAUSEASNAUTICSNAUTILINAVAIDSNAVALLYNAVARCHNAVARHONAVARINNAVETTENAVVIEDNAVVIESNAYSAIDNAYSAYSNAYWARDNAYWORDNEAFFESNEALINGNEAPINGNEARESTNEARINGNEATENSNEATESTNEATNIKNEBBICHNEBBINGNEBBISHNEBBUKSNEBECKSNEBULAENEBULARNEBULASNEBULESNECKERSNECKINGNECKLETNECKTIENECROSENECTARSNECTARYNEDDIERNEDDIESNEDDISHNEDETTENEEDERSNEEDFULNEEDIERNEEDILYNEEDINGNEEDLEDNEEDLERNEEDLESNEESINGNEEZINGNEGATEDNEGATERNEGATESNEGATONNEGATORNEGLECTNEGLIGENEGRESSNEGRONINEGUSESNEIGHEDNEINEISNEITHERNEKTONSNELLIESNELSONSNELUMBONEMATICNEMESESNEMESIANEMESISNEMNINGNEMORALNEOCONSNEOGENENEOLITHNEOLOGYNEONATENEOSOULNEOTENYNEOTYPENEPETASNEPHEWSNEPHRICNEPHRONNEPOTICNERDICSNERDIERNERDISHNEREIDSNERINESNERITESNERITICNEROLISNERVATENERVERSNERVIERNERVILYNERVINENERVINGNERVOUSNERVULENERVURENESHESTNESTERSNESTFULNESTINGNESTLEDNESTLERNESTLESNESTORSNETBALLNETFULSNETHEADNETIZENNETLESSNETLIKENETROOTNETSUKENETTERSNETTIERNETTIESNETTINGNETTLEDNETTLERNETTLESNETWORKNEURINENEURISMNEURITENEUROIDNEUROMANEURONENEURONSNEURULANEUSTICNEUSTONNEUTERSNEUTRALNEUTRONNEWBIESNEWBORNNEWCOMENEWELLSNEWMOWNNEWNESSNEWSBOYNEWSIERNEWSIESNEWSINGNEWSMANNEWSMENNEWTONSNEXUSESNGARARANHANDUSNIACINSNIBBINGNIBBLEDNIBBLERNIBBLESNIBLICKNIBLIKENICEISHNICHERSNICHINGNICKARSNICKELSNICKERSNICKINGNICKLEDNICKLESNICKUMSNICOISENICOTINNICTATENIDATEDNIDATESNIDDICKNIDGETSNIDINGSNIDUSESNIELLOSNIFFERSNIFFIERNIFFINGNIFTIERNIFTIESNIFTILYNIGELLANIGGLEDNIGGLERNIGGLESNIGHESTNIGHINGNIGHTEDNIGHTIENIGHTLYNIGIRISNIGRIFYNIHONGANILGAISNILGAUSNILGHAINILGHAUNILLINGNIMBLERNIMIETYNIMIOUSNIMMERSNIMMINGNIMONICNIMRODSNINCOMSNINCUMSNINEPINNINNIESNINTHLYNIOBATENIOBITENIOBIUMNIOBOUSNIPPERSNIPPIERNIPPILYNIPPINGNIPTERSNIRLIERNIRLINGNIRVANANISGULSNITCHIENITERIENITHERSNITHINGNITINOLNITPICKNITRATENITRIDENITRIDSNITRIFYNITRILENITRILSNITRITENITROSONITROUSNITRYLSNITTIERNITWITSNIVEOUSNOBBIERNOBBILYNOBBLEDNOBBLERNOBBLESNOBLESTNOCAKESNOCENTSNOCHELSNOCKETSNOCKINGNOCTUASNOCTUIDNOCTULENOCTURNNOCUOUSNODALLYNODATEDNODDERSNODDIERNODDIESNODDINGNODDLEDNODDLESNODICALNODULARNODULEDNODULESNOGGINGNOGGINSNOILIERNOINTEDNOINTERNOIRISHNOISIERNOISILYNOISINGNOISOMENOMADESNOMADICNOMARCHNOMBLESNOMBRILNOMINALNOMINEENOMISMSNONACIDNONAGEDNONAGESNONAGONNONANESNONARTSNONBANKNONBODYNONBOOKNONCASHNONCOLANONCOMSNONCORENONDRIPNONDRUGNONEGOSNONETTENONETTINONETTONONFACTNONFANSNONFARMNONFOODNONFUELNONGAMENONGAYSNONHEMENONHERONONHOMENONIRONNONJURYNONLIFENONMEATNONNEWSNONNIESNONOILYNONORALNONPAIDNONPASTNONPEAKNONPLAYNONPLUSNONPOORNONPROSNONSELFNONSKEDNONSKIDNONSLIPNONSTOPNONSUCHNONSUITNONUPLENONUSERNONUSESNONWAGENONWARSNONWOOLNONWORDNONWORKNONZERONOODGEDNOODGESNOODLEDNOODLESNOOGIESNOOKIERNOOKIESNOOLOGYNOONDAYNOONERSNOONINGNOOSERSNOOSINGNOPALESNOPLACENORIMONNORITESNORITICNORLANDNORMALSNORMANSNORSELSNORTENANORTENONORTHEDNORTHERNORWARDNOSEANSNOSEBAGNOSEGAYNOSHERSNOSHERYNOSHINGNOSIESTNOSINGSNOSODESNOSTOCSNOSTRILNOSTRUMNOTABLENOTABLYNOTAEUMNOTAIRENOTANDANOTATEDNOTATESNOTCHEDNOTCHELNOTCHERNOTCHESNOTEDLYNOTELETNOTEPADNOTHINGNOTICEDNOTICERNOTICESNOTIONSNOTITIANOUGATSNOUGHTSNOUMENANOUNIERNOURICENOURISHNOURSLENOUSELLNOUSLEDNOUSLESNOUVEAUNOVALIANOVATEDNOVATESNOVELLANOVELLENOVELLYNOVELTYNOVENAENOVENASNOVICESNOWHERENOWNESSNOWTIERNOXIOUSNOYADESNOYANCENOYESESNOYSOMENOZZERSNOZZLESNUANCEDNUANCESNUBBIERNUBBINGNUBBINSNUBBLEDNUBBLESNUBUCKSNUCELLINUCHALSNUCLEALNUCLEARNUCLEICNUCLEINNUCLEONNUCLEUSNUCLIDENUCULESNUDDIESNUDGERSNUDGINGNUDNICKNUDNIKSNUDZHEDNUDZHESNUFFINSNUGGARSNUGGETSNUGGETYNULLAHSNULLIFYNULLINGNULLITYNUMBATSNUMBERSNUMBESTNUMBINGNUMBLESNUMDAHSNUMERALNUMERICNUMMARYNUMNAHSNUNATAKNUNCIOSNUNCLESNUNDINENUNHOODNUNLIKENUNNERYNUNNISHNUNSHIPNUPTIALNURAGHENURAGHINURDIERNURDISHNURDLEDNURDLESNURHAGSNURLINGNURSERSNURSERYNURSINGNURSLEDNURSLESNURTURENUTATEDNUTATESNUTCASENUTGALLNUTJOBSNUTLETSNUTLIKENUTMEALNUTMEATNUTMEGSNUTPICKNUTRIASNUTSIERNUTTERSNUTTERYNUTTIERNUTTILYNUTTINGNUTWOODNUZZERSNUZZLEDNUZZLERNUZZLESNYAFFEDNYANZASNYBBLESNYLGHAINYLGHAUNYMPHAENYMPHALNYMPHETNYMPHICNYMPHLYNYMPHOS