Basic quintiliterals have five radicals without augmentation; augmented quintiliterals have five radicals plus added letters.
StructureTextbook example
Basicسَفَرْجَلٌ (quince)
Basicقُرْطَعْبٌ
Augmentedعُضْرُفُوطٌ (lizard)
Augmentedخَنْدَرِيسٌ (aged wine)
These are morphological specimens; a rare word can still demonstrate the structure of radicals and augmentation.