sibling

noun 0.745

rivalry

noun 0.717

sibship

noun 0.638

rival

noun 0.591

brotherly love

noun 0.590

feuding

noun 0.587

sib

noun 0.582

brotherliness

noun 0.580

infighting

noun 0.569

half brother

noun 0.563

kid brother

noun 0.561

squabbling

noun 0.560

little brother

noun 0.559

feud

noun 0.557

squabble

noun 0.556

fratricide

noun 0.555

intraspecific competition

noun 0.549

strife

noun 0.549

jealousy

noun 0.544

kid sister

noun 0.543

brother

noun 0.540

bickering

noun 0.538

sister

noun 0.538

twinship

noun 0.532

conflict

noun 0.530

little sister

noun 0.529

half sister

noun 0.529

archrival

noun 0.526

baby of the family

noun 0.521

bicker

noun 0.519

younger sister

noun 0.517

kinship

noun 0.515

brotherhood

noun 0.515

secondborn

noun 0.510

sisterhood

noun 0.505

turf war

noun 0.504

blood brother

noun 0.503

single child

noun 0.502

envy

noun 0.501