siblings; brothers and sisters
parents and siblings; one's relatives
foster sibling; foster brother; foster sister
sworn brother; buddy; pal
brothers and sisters; siblings
brother-in-law; stepbrother; sworn brother
half-sibling (with a different mother)
brotherly love; fraternal love; sibling affection
fellow pupil (apprentice)
men who have had sex with the same woman; (lit.) hole brothers
half-sibling (with a different father)