"spectroscopy" - key terms from Wikipedia

absorption spectroscopy
acoustic spectroscopy
astronomical spectroscopy
atomic absorption spectroscopy
atomic fluorescence spectroscopy
cd spectroscopy
correlation spectroscopy
dielectric spectroscopy
emission spectroscopy
epr spectroscopy
flame emission spectroscopy
flame spectroscopy
force spectroscopy
fourier transform spectroscopy
infrared spectroscopy
ir spectroscopy
magnetic resonance spectroscopy
meson spectroscopy
near infrared spectroscopy
nmr spectroscopy
nuclear magnetic resonance spectroscopy
photoelectron spectroscopy
plasma emission spectroscopy
raman spectroscopy
resonance raman spectroscopy
spectroscopy
terahertz time domain spectroscopy
tunable diode laser absorption spectroscopy