Letters that make physical contact
s, a, o, l, n, p, c, h, t, i, y are letters that make 'physical contact'
Words within physical contact
physical, physic, tact, act, si, NT, IC, AC, pH, SI, on, ic, sic, con, contact, CT, AL, CA, CO, Ac, Al, Ca, Co, Si, Ta are words within 'physical contact'