s, o, e, l, n, r, t, i, u are letters that make 'illustriousness'
trio, lust, IOU, USN, RI, SS, ill, illustrious, il, Rio, US, IL, NE, ness, Io, Es, Lu, Ne, Sn are words within 'illustriousness'
1 possible definitions for 'illustriousness'
Under this definition, illustriousness is a noun and has the following properties:
greatness has the same meaning as illustriousness
'illustriousness' can be a type of importance.
celebrated, illustrious, noted, far-famed, outstanding, great, famed, famous, notable, renowned are derivatives of 'illustriousness'.