All are 8 letter one word answers ending with the letters 'c i t y'. Ex: the city that is truthful is 'veracity'.
I will give the first letter.

-1. What city is monstrous? first letter a

-2. What city is lively? v

-3. What city is very happy? f

-4. What city is bold? a

-5. What's the city that doesn't have much of anything? s

-6. What city is speedy? v

-7. What city is full up? c

-8. What city is very wise? s

-9. What city is very fierce? f

-10. What city holds on tightly? t

6. velocity

Nice start ob.

9. ferocity

2. Vivacity https://www.youtube.com/watch?v=9MO1KyNUOIs

Good ones.

1. Atrocity

Thanks Mad.

3. felicity

4 - audacity

Merci.

10. tenacity

7. capacity

5. scarcity

Good ones.

8. Sagacity - Have a great weekend Curly

Bernie

Thanks Bernie.