mass difference

noun 0.641

atomic mass

noun 0.629

mass energy

noun 0.608

average atomic mass

noun 0.585

molecular mass

noun 0.565

mass number

noun 0.560

rest mass

noun 0.544

atomic mass unit

noun 0.543

binding energy

noun 0.535

mass

noun 0.534

mass function

noun 0.534

dark matter

noun 0.525

massiveness

noun 0.524

micromass

noun 0.523

gravitational mass

noun 0.520

mass spectrometry

noun 0.520

atomic weight

noun 0.520

relativistic mass

noun 0.519

massive

noun 0.513

solar mass

noun 0.509

mass fraction

noun 0.507

dry mass

noun 0.507

critical mass

noun 0.505

strange matter

noun 0.503