symbiosis: a relationship between two different organisms that live together and depend on each other
symmetry: having the same shape, size, and position on both sides of a dividing line
sympathy: feeling kindness together with someone who suffers; pity; commiseration, compassion
symposium: a conference or meeting together to discuss a topic
symptoms: the conditions that together tell a doctor what is wrong
synagogue: a place for meeting together for worship and religious instruction in the Jewish faith
syndicate: a group of business people working together
synonym: a word that has the same meaning as another word
synthesis: parts put together to make a whole
synthetic: formed to gather from artificial parts; not genuine; fake