Based on giants, new words formed by adding one letter at the beginning or end:
b - basting c - actings casting e - easting eatings ingates ingesta seating teasing f - fasting h - hasting k - skating staking takings tasking l - lasting salting slating staling m - masting matings o - agonist gitanos p - pasting r - gastrin gratins ratings staring v - staving w - tawsing wasting y - staying stygian