nephew
My sister just had her first scan. Hello my future nibling!
I took my niblings trick or treating.
My nibling just told me pterodactyls are related to dinosaurs but not actual dinosaurs.

SMART Vocabulary: related words and phrases

Family: relations in general
anti-family
aunt
auntie
baby daddy
baby mama
family man
father
fatherhood
filial
filially
kinship
kinsman
kinswoman
kith and kin
long-lost
relationship
relative
removed
second cousin
sib