Aren't the dwarves supposed to be racist Jewish stereotypes? Long beards? Evil usurers? Enemies to the "enlightened"? Czech czech czech. It doesn't help Tolkien was a super-catholic and injected some christian themes even if Jesus figures are not involved (unless Gandolf counts).

In that case, it's probably supposed to be Hebrewish~; the single consonants could represent fricatives or affricates intravocally, while <th> and <kh> may be more ejective. Also, it might explain the utter rarity of /f/ and /v/, which may be initial in loans or reduction of an earlier cluster.  The null initiall for the vowels and the geminates, in addition could be a glottal stop and plain plosives, respectively- but the first three minimal pairs aren't semantically related at all. The surplus of vowel-initial words is obviously from loss of /h/, /j/, and /?/.

The others, however, very much could be (with geminates signifying intensity) as in Hidor "howl, caw" -> Hiddor "lark, yeller", Hogon "drawl, slurr" -> Hoggon "spew, vomit", Hazin "watchful, watcher, watch" -> Hazzin "wary, livid, impatient, paranoid".

http://www.timesofisrael.com/are-tolkiens-dwarves-an-allegory-for-the-jews/