This is a list (far from being full! ) of some words living in the TRIANGLE word.

Age, air, ale, alert, alerting, align, alter, altering,
angel, angle, are, art, ate,
ear, earl, earn, eat, era,
gain, gale, gate, gilt, gin, girl, grain,
grant, grat, grate, great, grit,
in, integral, lag, lane, large, later, leant, learn, leg,
let, lier, line, lire, lit, liter, nail, near, neat, net,
rag, rail, rain, rate, real, relating, ring, ringlet,
tag, tail, tale, tan, tangle, tar, targe, terga, tie,
tiger, tile, tin, tire, trail, train,
triangle...