Transdeletion pyramid

A transdeletion pyramid (also called a transaddition pyramid or word pyramid when inverted) is a logological term for the triangular representation of a list of words in which each one is a scrambled form of the above word without one letter.
This seventeen-letter transdeletion pyramid, made of inferred words in an Unabridged Merriam-Webster dictionary, can be found in Ross Eckler's book "Making the Alphabet Dance":
 A N T I C E R E M O N I A L I S T
 N O N M A T E R I A L I T I E S
 O R N A M E N T A L I T I E S
 I N T E R L A M I N A T E S
 M A T E R N A L I T I E S
 M A T R I L I N E A T E
 T R I L A M I N A T E
 T E R M I N A L I A
 L A T I M E R I A
 M A T E R I A L
 T A L I E R A
 R E T A I L
 A L T E R
 R A T E
 T E A
 A T
 A