The Collaborative International Dictionary of English v.0.48:

Piny \Pin"y\, a.
   Abounding with pines. [Written also piney.] "The piny
   wood." --Longfellow.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

43 Moby Thesaurus words for "piny":
   arborary, arboreal, arboreous, arborescent, arboresque, arborical,
   arboriform, backwoodsman, briar-hopper, brush ape, bushlike,
   bushman, bushy, citrous, clam digger, coniferous, cracker,
   deciduous, dendriform, dendritic, dendroid, desert rat, evergreen,
   forester, frontiersman, hardwood, hillbilly, hinterlander,
   mountain man, mountaineer, nondeciduous, redneck, ridge runner,
   scrubbly, scrubby, scrublike, shrubby, shrublike, softwood,
   treelike, woodlander, woodman, woodsman