diurnal

noun 0.761

daytime

noun 0.581

circadian rhythm

noun 0.576

solar day

noun 0.574

space motion

noun 0.561

self-motion

noun 0.555

motion

noun 0.546

nocturnal

noun 0.542

time of day

noun 0.540

noonday

noun 0.532

mean solar day

noun 0.530

perpetual motion

noun 0.522

daylength

noun 0.519

lunar phase

noun 0.507

simple harmonic motion

noun 0.507

nighttime

noun 0.506

sunup

noun 0.505

daylight

noun 0.505

motion parallax

noun 0.502

motility

noun 0.501

dailiness

noun 0.500