protoplanetary disk

noun 0.763

protosun

noun 0.719

protostar

noun 0.708

planetesimal

noun 0.705

inner planet

noun 0.664

planetoid

noun 0.639

terrestrial planet

noun 0.634

protoporphyrin

noun 0.622

protome

noun 0.616

protoplast

noun 0.615

protoplasm

noun 0.610

planet

noun 0.610

dwarf planet

noun 0.606

planetary

noun 0.603

outer planet

noun 0.602

protocell

noun 0.601

protomer

noun 0.599

giant planet

noun 0.593

planetology

noun 0.588

protostome

noun 0.585

minor planet

noun 0.584

extrasolar planet

noun 0.582

planetary system

noun 0.579

primordium

noun 0.556

proton

noun 0.554

prototype

noun 0.546

planetary nebula

noun 0.540

planetary science

noun 0.537

protoporphyria

noun 0.537

protozoon

noun 0.534

protist

noun 0.533

gas giant

noun 0.533

primordial

noun 0.529

progenitor

noun 0.528

pluton

noun 0.519

protocone

noun 0.510

protozoan

noun 0.507

pronucleus

noun 0.506

protolith

noun 0.505

protomartyr

noun 0.504

prokaryote

noun 0.502

protium

noun 0.500