Pyramid
The pyramid is inherently double (see double forms).
Inverted:
M COMBATMISSION
GAG YOUREINLUCK
LAGOS BLINDCOPY
SENNETT BANDITS
SHEDATEAR SILTS
SEIZETHEDAY SEE
DONNAREEDSHOW S
A truncated pyramid has even-length across entries, instead of odd-length:
Truncated: Inverted Truncated:
AR CIRCUMSTANTIAL
BRAM FEELONESOATS
TRAVIS CENSORIOUS
CRIMELAB SATURANT
SHENANIGAN RETANS
REENGINEERED LENS
GIANTSCAUSEWAY DE