incognitum

noun 0.671

incognita

noun 0.660

virgin territory

noun 0.620

terra

noun 0.620

unknown

noun 0.615

terra firma

noun 0.614

terrain

noun 0.560

territory

noun 0.557

edge of the earth

noun 0.554

unknowable

noun 0.551

edge of the world

noun 0.546

unfamiliar

noun 0.541

terra preta

noun 0.531

unseen

noun 0.523

frontier

noun 0.519

unknowing

noun 0.517

unknowability

noun 0.517

inconnu

noun 0.515

tundra

noun 0.514

back of beyond

noun 0.507

obscurity

noun 0.507

unfamiliarity

noun 0.507

wilderness

noun 0.504

dark space

noun 0.504

ignoramus

noun 0.501