massive, mammoth, titanic, monster, honking, hulking
Gargantuan.
Large, stupendous, gigantic, -- all the words you find on a movie advert. Otherwise, a dictionary of synonyms and antonyms will be a good start, as will be a thesaurus.
No 4 letter words but: VDU Monitor Display All mean computer screen.
Some words (I don't know them all) with the second letter U:aughtautobuckburnbuttercurecutcuteduckdungeondurableeurekaEuropefunnyfurygumballguruhugehumblejumpjuniperjunkkudoskukuiluckyluminousmudmunchmunicipalnumbnumerousnuttyoughtouroutsidepullpunishpurequietquitruggedrumorrushsuddenlysugarsureturnturtletutorZulu
You may be thinking of a dictionary, but all the words in the chapter do not start with the same letter. All the words to be defined do, but the language of the definitions do not.
Six letter words starting with N:naggednailednapkinnationnaturenectarnearlyneaterneatlyneededneedleneckednegatenervesnestednestleneuternibblenicelynickelniecesnightsnimbleninetynogginnipplenobodynoodlenormalnoticenotionnovelsnovicenozzlenudgednuggetnursesnumbernurishnuzzlenylons
Some 4 letter Christmas words are:treegiftbellwishloveshopsnowsale
Nice Mice Mile Mild Meld Mead Mean Hope this helps!
Big, Giant, and colossal are a few examples.
Some 7 letter S words are:salvagesauntersausagesandingscatterscamperscratchscuffleseasicksectionselfishsendingserioussessionshapelyshiftedsharpenshattershackleshakingsharingshimmershowingshuttershovelsshortlyshowersshuttlesickbedsizzledskilledskatingslammerslimmersmudgedsnaggedsnarledsnowmansnowingsnorkelsolvingsoldierspatterspecialspoiledsputterstaffedstaggerstalkerstarvedstammerstapledstationstartlestiffenstoragestressedstretchstingerstringystrikesstumblestutterstylishsubjectsublimesuctionsugaredsummarysupportsupposeswaggersweatersweeperswelterswingerswimmersyringe
letter 'e'
Kick
http://www.scrabble.org.au/words/twos.htm