fossa/ʹfosə/ noun (pl fossae /ʹfosee, ʹfosie/)

• open house
• opening
• opening time
• open learning
• open letter
• openly
• open market
• open marriage
• open-minded
• openmouthed
• open one's budget
• open out
• open-plan
• open prison
• open question
• open-reel
• open sandwich
• open season
• open secret
• open sesame
• open shop
• open slather
• Open University
• open up
• open verdict