WordNet sense 1 (providing abundant nourishment):

hearty, satisfying, solid, square

WordNet sense 2 (conducive to or characteristic of physical or moral well-being):

wholesome

WordNet sense 3 (of good quality and condition; solidly built):

strong

WordNet sense 4 (in good condition; free from defect or damage or decay):

sound

WordNet sense 5 (having a firm basis in reality and being therefore important, meaningful, or considerable):

substantive

WordNet sense 6 (basic and fundamental):

essential

WordNet sense 7 (having substance or capable of being treated as fact; not imaginary):

material, real, real, real

WordNet sense 8 (fairly large):

significant

WordNet sense 9 (large or relatively large in number or amount or extent or degree):

considerable