YES

(VAR x y)
(RULES
  f(x) -> a()
  g(x,y) -> a()
  h(x,y) -> a()
)

(COMMENT
Termination is shown by KBO with weight

  w0 = 2
  w(h) = 0
  w(f) = 1
  w(g) = 1
  w(a) = 2

and precedence:

  h > f > g > a
)