s, a, o, d, e, f, l, h, r, t, i are letters that make 'head for the hills'
hill, OR, hi, he, ad, FO, He, Hill, Ea, ill, il, AD, head, the Hill, HI, IL, Th are words within 'head for the hills'
1 possible definitions for 'head for the hills'
Under this definition, head for the hills is a verb and has the following properties:
break away, scat, scarper, turn tail, run away, hightail it, take to the woods, fly the coop, bunk, run, escape, lam have the same meaning as 'head for the hills'
flee, fly, take flight, skedaddle are types of 'head for the hills'.
getaway, fugitive, fleer, runaway, lam are derivatives of 'head for the hills'.