NEIGHbor, NEIGHborhood, NEIGHborliness: no matter what suffix we add, the emphasis stays on the first syllable. This is bound stress. PHOtograph, phoTOGraphy, photoGRAPHic: the emphasis changes from syllable to syllable without any good reason. This is free stress.
"Can Stress Induce Homography?,"
Word Ways: Vol. 14
, Article 17.
Available at: http://digitalcommons.butler.edu/wordways/vol14/iss4/17