Some of these names have been used by pro teams, but that doesn't matter here.
Color/adjective prefixes or different plurals don't make for a unique team name. For example: the Maine Black Bears, Lehigh Mountain Hawks, and Tulane Green Wave are close enough to other teams called the Bears, Hawks, and the Pepperdine Waves to not count here. Nor does this count in reverse.
If the base name isn't there, like there being two teams called Blue Devils and if there was another one called the Red Devils, that is different enough to count.