WordNet (r) 3.0 (2006):

biophysics
    n 1: physics as applied to biological problems

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "biophysics":
   Newtonian physics, acoustics, aerobiology, aerophysics,
   agrobiology, anatomy, applied physics, astrobiology, astrophysics,
   bacteriology, basic conductor physics, biochemics, biochemistry,
   biochemy, bioecology, biological science, biology, biometrics,
   biometry, bionics, bionomics, botany, cell physiology,
   chemical physics, cryobiology, cryogenics, crystallography,
   cybernetics, cytology, cytophysics, ecology, electrobiology,
   electron physics, electronics, electrophysics, embryology,
   enzymology, ethnobiology, exobiology, genetics, geophysics,
   gnotobiotics, life science, macrophysics, mathematical physics,
   mechanics, medicophysics, microbiology, microphysics,
   molecular biology, natural philosophy, natural science,
   nuclear physics, optics, pharmacology, philosophy, physic,
   physical chemistry, physical science, physicochemistry,
   physicomathematics, physics, physiology, psychophysics,
   radiation physics, radiobiology, radionics, solar physics,
   solid-state physics, statics, stereophysics, taxonomy,
   theoretical physics, thermodynamics, virology, xenobiology,
   zoology, zoophysics