I'd say "materia" is the answer. The first verse seems to be describing different sorts/colours of materia, and then in the second verse you have:
Mountain's majesty encased (Mako energy ---> crystalisation ----> materia etc.)
In everlasting forms (I doubt life energy is bio-degradable)
The word that all contain (All the different kinds of materia, 'support materia', 'command materia' etc. the word that all of them contain is "materia")
Is that which you seek
