Wonderful is a nine letter word. It begins with the letter w and ends with l.
Draft, drift, duvet...
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CandyCarryCrazyCassyCatty
Kayla. Karla too.
furlough
Daffodill
How can the word be 3 letters long if "sand" alone is 4? .
diligent
One word that fits your criteria is "distant." It starts with the letter 'd,' ends with 't,' and contains seven letters.
isogloss
Draft, drift, duvet...
homely, homily, humbly
Of course, there are many 8 letter words that begin with the letter Y. One is yardwork. A word that is 10 letters long and starts with an N could be nauseating
shredding shreiking scrubbing strumming stressing strolling
Carats.
bandoleersbusinessesbandicootsbuttoneersballoonersBraziliansbattalionsboyfriendsbellyachesbiologistsbeautifiesbadragglesbesmirchesbotanicalsbillboardsbubblegumsBostoniansbenchpressbrassieres
Brittany