Sibling
Part of speech: noun
Definition: A person who shares same parents. One's brother or sister.
Example sentence: Friends are the siblings God never gave us.
Sib
Part of speech: adjective
Definition: related, by birth or descent; similar to
Part of speech: noun
Definition: Kindred, (blood) relativesA kinsman, blood relation.A sibling, brother or sister (irrespective of gender)Any group of animals or plants sharing a corresponding genetic relationA group of individuals unilaterally descended from a single (real or postulated) common ancestor