The book recognizes jāmid nouns with three, four or five radicals. Each of these can be unaugmented or augmented.
RadicalsUnaugmentedAugmented
ThreeTriliteral mujarradTriliteral mazīd
FourQuadriliteral mujarradQuadriliteral mazīd
FiveQuintiliteral mujarradQuintiliteral mazīd
This makes six types. Count underlying radicals rather than all letters seen in spelling.