frontier

noun 0.733

cutting edge

noun 0.615

leading edge

noun 0.600

forefront

noun 0.597

front

noun 0.562

fundamental science

noun 0.557

frontiersman

noun 0.553

front line

noun 0.550

event horizon

noun 0.545

foreground

noun 0.544

borderland

noun 0.544

boundary

noun 0.543

edge of the world

noun 0.540

foreland

noun 0.531

scientific problem

noun 0.526

pioneering

noun 0.525

basic science

noun 0.522

bleeding edge

noun 0.521

technical area

noun 0.521

horizon

noun 0.520

brink

noun 0.519

breakthrough

noun 0.519

battlefront

noun 0.516

field of study

noun 0.516

groundbreaking

noun 0.511

forward

noun 0.510

frontcountry

noun 0.509

fore edge

noun 0.509

forward line

noun 0.508

avant-garde

noun 0.508

space science

noun 0.505

vanguard

noun 0.502

cosmological horizon

noun 0.501

futurology

noun 0.501