Synonyms for Trillion:

adj.

five or more (adjective)
Jillion, hexadic, billion, septuple, sevenfold, decennary, octagonal, Heptagonal, hexagonal, kilo, thousand, Sexennial, Hexahedral, centenary, dozen, Septennial, sextuple, sixfold, million, octad.

n.

gob, mass, lot, much, scad, wad, pile, a good/great deal of something, big, all manner of something, ream, multiplicity, heap, quantity, slew, a lot/lots, passel, oodles, a load of/loads of something, bushel, abundance, peck, load, quite a few. five, eleven, cardinal number, eight, eighty, fifteen, fifty, crore, eighteen. bushel (noun)
pile, wad, heap.
five or more (noun)
octave, decade, hexad, teens, hundred, score, octagon, decennium, grand, octavo, Duodecimo, gross, hundredfold, octet, fourscore.
trillion (noun)
mass, lot, cardinal, a trillion, million, abundance, scad, multiplicity, one million million million, load, 1000000000000, one million million, ream, thousand, Jillion, quantity, much.

Other synonyms:

ream, bushel, slew, scad, passel. multiplicity, oodles, gob. heap, wad. load. lot. Other relevant words:
oodles, much, slew, one million million million, one million million, mass, load, ream, scad, bushel, gob, peck, quantity, pile, multiplicity, abundance, lot, cardinal, heap, passel, wad, 1000000000000.