While “hood” itself is not a terribly funny word, the dwarves are all introduced with them in their many colors and over time they become tattered and draggled, they poke out of webs, and they wave ridiculously before their knees to Beorn.  We associate the hoods with silliness or maybe parochial quaintness by the time we get past the Chapter 10 inflection point.  They contrast with bright helms in Chapter 13, and then!  A hood disguises Gandalf and he dramatically casts it aside to reveal himself.  At the end of the mentions of hoods, Thorin has cast his own aside to reveal a kingly, heroic figure ready for grim battle.  Hoods are softeners, disguises.  I’m going to label them as “funny” until we see a pattern of such words and come up with a better tag.

• 01.026 and very bright eyes under his dark-green hood.
• 01.027 He hung his hooded cloak on the nearest peg,
• 01.031 and a scarlet hood;
• 01.032 he said when he caught sight of Dwalin’s green hood hanging up.
• 01.038 both with blue hoods,
• 01.040 and they both swept off their blue hoods
• 01.046 and very soon two purple hoods,
• 01.046 a grey hood,
• 01.046 a brown hood,
• 01.046 and a white hood were hanging on the pegs,
• 01.050 Then they hung up two yellow hoods
• 01.051 looking at the row of thirteen hoods –
• 01.051 the best detachable party hoods –
• 02.025 I have got a spare hood
• 02.026 and Bilbo was wearing a dark-green hood
• 02.029 his hood was dripping into his eyes,
• 06.001 He had lost hood,
• 06.005 a head with a red hood on:
• 06.016 and I take off my hood to you.’
• 07.069 and waving their hoods before their knees
• 07.128 and sweepings of their hoods
• 08.031 They could still see his hood
• 08.088 or a bit of beard or of a hood.
• 08.106 he thought by the tip of a blue hood sticking out at the top.
• 10.010 and tattered sky-blue hood
• 10.020 and draggled hood.
• 13.041 and their bright helms with their tattered hoods,
• 17.003 in cloak and hood
• 17.016 threw aside his hood
• 17.055 Hood and cloak were gone;