Is #14 Tom Bombadil's poems, them?
... ah, and #5 is the WATCHER IN THE WATER, addicted to M(ordor)TV.
The theme almost seems to be 'obstacles faced by Frodo', except in that case 'Aragorn's singing' is bizarrely cruel.
What was faced on Caradhras? Avalanche, snow, wolves/wargs (sorta), and a Balrog. Plosives are TKPDGB, and a slithery thing could be a worm or a snake... I guess at one point they used a fire to B[E] W[O>A]RM, but that's a bit too tenuous.
Or I suppose Slowworm + T kind of makes SNOWSTORM, but again...
hS