Ill-defined:

Dark Xillion = 10^^...^^(-10^6) with 10^6 arrows

Dark Photillion = 10^^(-10^6)

Well-defined:

Void Drive = 0

Voidend = (10^^^10)^-1

Void Fire = (9^^8^^7^^6^^5^^4^^3^^2)^-1

Void Onionmine = (10^^Onionmine)^-1

Voidmine = (10^^215)^-1

Alphillion = (10^^10)^-1

Betillion = (10^^9)^-1

Gammillion = (10^^8)^-1

Deltillion = (10^^7)^-1

Epsillion = (10^^6)^-1

Void Castle / Zetillion = 10^(-10^10^10^10)

Void Super Photillion = 10^(-10^10^10^6)

Void Super Higgsbillion = 10^(-10^10^3000)

Void Super Axillion = 10^(-10^10^1500)

Etillion = 10^(-10^10^10)

Thetillion = 10^(-10^10^9)

Void Photillon = 10^(-10^10^6)

Void Higgsbillion = 10^(-10^3000)

Void Axillion = 10^(-10^1500)

Void Inflatillion = 10^(-10^750)

Atokyllion = 10^(-1.2*10^14)

Photillion = 10^(-10^6)

Iotillion = 10^(-10^5)

Kappillion = 10^(-10^4.5)

Glillion = 10^(-10^4)

Bosillion WZ = 10^-5000

Higgsbillon = 10^-3000

Electrillion = 10^-2750

Positillion = 10^-2500

Muillion = 10^-2250

Taillion = 10^-2000

Qu-Killion = 4*10^-1800

Di-Gammillion = 2*10^-1777

Axillion = 10^-1500

Curvatillion = 10^-1416.64

Dilatillion = 10^-1000

Lambdillion = 10^-999

Gravitillion = 10^-900

Du-Gravitillion = 2*10^-900

Graviphotillion = 10^-840

Inflatillion = 10^-750

Lept-Qu-Killion = 3740^-450

Majoronillion = 10^-417.19

Preonillion = 10^-350

Tachyillion = 10^-333.333

H-Bosillion WZ = 10^-245

Bosillion XY = 10^-220

Skyrillion = 10^-200

Glubillion = 10^-175

Themesillion = 10^-140

Temesillion = 10^-120

Negatum = 1596^-37

Nuillion = 10^-100

Protillion = 10^-61

Neutrillion = 10^-60

Del-Barillion = 1.4*10^-60

Lam-Barillion = 1.7*10^-60

Sig-Barillion = 2*10^-60

Xi-Barillion = 2.5*10^-60

Om-Barillion = 5*10^-60

Pillion = 10^-50.31415

Xillion = 10^-50

Rhomesillion = 10^-45

Weak Etamesillion = 10^-41

Etamesillion = 10^-40

Phi-Mesillion = 1.1*10^-40

Psi-Mesillion = 1.2*10^-40

Om-Mesillion = 1.3*10^-40

Strong Epsimesillion = 10^-35

Killi-Mesillion = 10^-30

Atyllion = 10^-27

Bari-Mesillion = 10^-24

Demesillion = 10^-22

Qu-Killi-Mesillion = 10^-20

Qu-Tetrakillion = 4*10^-20

Qu-Pentakillion = 5*10^-20

Atillion = 10^-16

Exo-Atillion = 10^-15

Strong Atillion = 5*10^-15

Anyillion = 10^-13

Davy-Solillion = 10^-12

Dropetillion = 10^-11

Excitillion = 10^-10

Fractillion = 10^-9

Magnillion / Antimyllion = 10^-8

Phonillion = 10^-7

Plasmarillion / Antimillion = 0.000001

Plasmillion = 0.00001

Polaritillion = 0.0001

Detrum = 1596^-1

Polarillion = 0.001

Rotillion = 0.01

Triollion = 0.1