Foss

The USS Foss was an American Buckley Class escort destroyer of 1400 tons displacement launched in 1943. The USS Foss had a top speed of 26 knots and carried a complement of 220. She was armed with three 3 inch guns; two 40 mm anti-aircraft guns; six 20 mm anti-aircraft guns; depth charge throwers and three 21 inch torpedo tubes in a triple mount.
Found on http://www.probertencyclopaedia.com/browse/RF.HTM

Foss

Meaning as a surname: Ditch or Roman road called the Fosse Way.
Found on http://www.encyclo.co.uk/local/20139

foss

free, open source software
Found on http://www.noslang.com/dictionary/f/

foss

waterfall(s)
Found on http://pubs.usgs.gov/of/1995/of95-807/geoicelandic.html

foss

ditch, moat, trench or canal
Found on http://phrontistery.info/f.html
No exact match found