brothers and sisters; siblings
sisterly love; affection between sisters
threesome including two women who are sisters
women who have had sex with the same man; (lit.) pole sisters
half-sister (different father); half-sisters
pogo sisters; women who have had sex with the same man
companion (sister) volume (to); sequel (to)
sister chromatid exchange
sister language; related language; cognate
sister group; sister taxon