Letters that make lighter-than-air
a, e, g, l, n, h, r, t, i are letters that make 'lighter-than-air'
Words within lighter-than-air
ER, AN, te, IR, Han, HA, light, li, air, AI, ai, lighter, Light, Er, Ir, Li, Te, Th, Ig are words within 'lighter-than-air'