1. AGLET
7. FERRULE
9. HEMIDEMISEMIQUAVER
15. KICK or PUNT
20. OCTOTHORPE
23. PHOSPHENES
But of those, the only ones I learned "organically" are phosphenes, because their a symptom of optical migraines, and hemidemi... because of years of drum lassons. The others I picked up from other "odd words" lists.