Brobdingnagian
1. A good word
2. A long word
3. A word with lots of letters
4. Lots of letter that can make lots more words
5. As follows

Brobdingnagian, Part 1
1. Gaining
2. Grinning
3. Groaning
4. Going
5. Gong

Brobdingnagian, Part 2
1. Dining
2. Dinging
3. Donging
4. Dabbing
5. Dong

Brobdingnagian, Part 3
1. Broad
2. Broding
3. Bong
4. Bring
5. Brand

Brobdingnagian, Part 4
1. Boarding
2. Binding
3. Banding
4. Bonding
5. Banning

Brobdingnagian, Part 5
1. Noggin
2. Inning
3. Aiding
4. Robbing
5. Nabbing