Crossword solverSynonyms for sinus9 crossword answers for “sinus” (5), sorted by letter count.How many letters?All9711011221311447 letters 1fistula10 letters 1nasal sinus(5,5)12 letters 2ethmoid sinus(7,5)frontal sinus(7,5)13 letters 1coronary sinus(8,5)14 letters 4cavernous sinus(9,5)ethmoidal sinus(9,5)paranasal sinus(9,5)maxillary sinus(9,5)