Missing (acrostic and palindrome)

Memory knelling and gnawing
internally trilling wave's nestled
Seared hole dormant interminably
seeking unknown stopple
inevitably unbridling sinfully
Nostalgia is severely ignited
greatly yowling hails misery

- Apt to look for the fallen tooth of spring -

Misery hails, yowling greatly
ignited severely is nostalgia
sinfully unbridling inevitably
Stopple unknown seeking
interminably dormant hole seared
Nestled wave's trilling internally
gnawing and knelling memory

written for a club contest, with the following rules:
1) 7 lines long or more
2) acrostic or palindrome
3) less than 3 syllable title
4) At least 10 of the words included:
* Havoc
* Rescue
* Sear
* Tea
* Unbridle
* Knell
* Apt
* Grand
* Sin/Sins/Sinful
* Throb
* Windowsill(s)
* Youth
* Wreckage
* Yowl
* Avenue
* Dormant
* Doomsday
* Trill
* Wave
* Hail
* Haw
5) Add:
* A mythological God/Goddess.
* Or use a name of month or a season:
* Or a name of a flower. Use it as a symbol.