Answer: sigmas

AnswerCrossword Clue
SIGMASSibilants for Socrates
SIGMASE-shaped letters
SIGMASOdysseus trio, to Homer
SIGMASGreek consonants
SIGMASGreek letters
SIGMASFraternity letters
SIGMASSum symbols in math
SIGMASGreek letters.
SIGMASLetters from Greece
SIGMASSummation signs
SIGMASSorority letters
SIGMASSymbols in calculus
sigmasthe 18th letter of the Greek alphabet
sigmasSIGMA, a Greek letter