darkness, dimness

MURKINESS
WordClue
DUSKdarkness, obscurity
GLOOMDarkness, dimness or obscurity
HEART... of Darkness (Conrad)
SHADEdarkness, murkiness
DIMNESSdarkness, gloom
OPACITYobscurity, dimness
DARKNESSdimness, gloom
NIGHTFALLdarkness, dusk
OBSCURITYopacity, dimness
OBSCURITYDarkness
GLOOMDarkness, dimness or obscurity