| ONT | 4-Down province, briefly |
| ONT | 8-Down's northern neighbor: Abbr. |
| ONT | A prov. |
| ONT | Abbreviation for Optical Network Termination |
| ONT | Blue Jays prov. |
| ONT | Bruce Peninsula locale: Abbr. |
| ONT | CN Tower's home: Abbr. |
| ONT | Can. prov. |
| ONT | Can. province |
| ONT | Can.'s most populous province |
| ONT | Canad. province |
| ONT | Canada's most populous prov. |
| ONT | Canada's most populous province, for short |
| ONT | Canadian Province, for short |
| ONT | Canadian neighbor of Minnesota: Abbr. |
| ONT | Canadian prov. |
| ONT | Canadian province (Abbr.) |
| ONT | Canadian province (abbr) |
| ONT | Canadian province of the Blue Jays, Senators, and Maple Leafs (Abbr.) |
| ONT | Canadian province that borders Minnesota and Michigan, for short |
| ONT | Canadian province where the national capital is: Abbr. |
| ONT | Canadian province whose capital is Toronto (Abbr.) |
| ONT | Fort Erie's home: Abbr. |
| ONT | Ft. Erie's home |
| ONT | Ft. Erie's locale |
| ONT | Ft. Erie's province |
| ONT | Hamilton's prov. |
| ONT | Home of Bruce Peninsula Natl. Park |
| ONT | Home of Niagara Falls: Abbr. |
| ONT | Home of Point Pelee Natl. Park |
| ONT | Home of Polar Bear Prov. Park |
| ONT | Home of Sault Ste. Marie: Abbr. |
| ONT | Home of St. Clair College |
| ONT | Home of Thunder Bay: Abbr. |
| ONT | Home of Waterloo: Abbr. |
| ONT | Home of the Hockey Hall of Fame: Abbr. |
| ONT | Home prov. of Olympic swimming champ Summer McIntosh |
| ONT | Home province of Canadian music artists Drake and The Weeknd (Abbr.) |
| ONT | Home to Queens U. |
| ONT | Home to Stratford: Abbr. |
| ONT | Hudson Bay prov. |
| ONT | It borders Hudson Bay (abbr.) |
| ONT | It borders Hudson Bay: Abbr. |
| ONT | It borders James Bay: Abbr. |
| ONT | It borders Lake Huron: Abbr. |
| ONT | It borders four Great Lakes: Abbr. |
| ONT | It shares a 1,650+ mile border with the U.S.: Abbr. |
| ONT | It spans Minn. to N.Y. |
| ONT | It touches four Great Lakes: Abbr. |
| ONT | It's across the St. Lawrence from N.Y. |
| ONT | It's between Man. And Que. |
| ONT | It's e. of Detroit |
| ONT | It's north of Minn. |
| ONT | It's on the St. Lawrence River: Abbr. |
| ONT | It's on the St. Lawrence: Abbr. |
| ONT | It's superior to Lake Superior: Abbr. |
| ONT | It's west of 12-Down: Abbr. |
| ONT | It's west of James Bay: Abbr. |
| ONT | It's west of Que. |
| ONT | Its cap. is Toronto |
| ONT | London locale: Abbr. |
| ONT | London's home: Abbr. |
| ONT | London's locale: Abbr. |
| ONT | London's place: Abbr. |
| ONT | London's prov. |
| ONT | Malibu's James Cameron's Can. birthplace, in brief |
| ONT | Maple Leafs prov. |
| ONT | Mich. neighbor |
| ONT | Minn. Neighbor |
| ONT | Minn. neighbor |
| ONT | Mississauga’s province: Abbr. |
| ONT | Most populous Canadian prov. |
| ONT | Most populous Canadian province (Abbr.) |
| ONT | Most-populous Canadian province: Abbr. |
| ONT | N.Y. neighbor |
| ONT | NY neighbor |
| ONT | Neighbor of MI and MN |
| ONT | Neighbor of Man. |
| ONT | Neighbor of Man. and Minn. |
| ONT | Neighbor of Mich. |
| ONT | Neighbor of Mich., Minn., and Man. |
| ONT | Neighbor of Minn. |
| ONT | Neighbor of Minn. and Mich. |
| ONT | Neighbor of Minn. and N.Y. |
| ONT | Neighbor of N.Y. |
| ONT | Neighbor of N.Y. and Minn. |
| ONT | Neighbor of NY |
| ONT | Neighbor of Que. |
| ONT | Neighbor of Que. & Man. |
| ONT | Niagara Falls locale: Abbr. |
| ONT | Niagara Falls' prov. |
| ONT | Niagara Falls's prov. |
| ONT | Niagara's prov. |
| ONT | Northern neighbor of Mich. |
| ONT | One side of Niagara Falls: Abbr. |
| ONT | Ottawa loc. |
| ONT | Ottawa's loc. |
| ONT | Ottawa's prov. |
| ONT | Ottawa's province (Abbr.) |
| ONT | Ottawa's province, for short |
| ONT | Ottawa's province: Abbr. |
| ONT | Ottawa’s province: Abbr. |
| ONT | Peter Jennings's birthplace: Abbr. |
| ONT | Prov. Mike Myers was born in |
| ONT | Prov. at one end of the Ambassador Bridge |
| ONT | Prov. between Manitoba and Quebec |
| ONT | Prov. between Manitoba and Quebec (abbr.) |
| ONT | Prov. bordering Hudson Bay |
| ONT | Prov. bordering Manitoba |
| ONT | Prov. bordering New York |
| ONT | Prov. bordering four Great Lakes |
| ONT | Prov. east of Manitoba |
| ONT | Prov. north of Minn. |
| ONT | Prov. north of the Great Lakes |
| ONT | Prov. of Ottawa |
| ONT | Prov. of the Toronto Maple Leafs |
| ONT | Prov. on Hudson Bay |
| ONT | Prov. on Niagara Falls |
| ONT | Prov. south of the Hudson Bay |
| ONT | Prov. that borders all but one of the Great Lakes |
| ONT | Prov. west of 58-Down |
| ONT | Prov. west of Niagara Falls |
| ONT | Province between Man. and Que. |
| ONT | Province bordering Manitoba, for short |
| ONT | Province in Canada: ___ario |
| ONT | Province next to Que. |
| ONT | Province of the Toronto Maple Leafs (Abbr.) |
| ONT | Province on Hudson Bay: Abbr. |
| ONT | Province opp. Detroit |
| ONT | Province that borders NY |
| ONT | Province west of Que. |
| ONT | Province where the Blue Jays, Raptors, and Senators are based (Abbr.) |
| ONT | Que. adjoiner |
| ONT | Que. neighbor |
| ONT | Que. neighbour |
| ONT | Sioux Lookout setting: Abbr. |
| ONT | Southernmost Canadian prov. |
| ONT | St. Lawrence Islands Natl. Park setting |
| ONT | Taking testosterone, for short |
| ONT | Text character in a specific style or size: f___ |
| ONT | The Albany is its longest river: Abbr. |
| ONT | Thunder Bay locale: Abbr. |
| ONT | Thunder Bay prov. |
| ONT | Thunder Bay's locale, for short |
| ONT | Thunder Bay's prov. |
| ONT | Toronto Raptors' prov. |
| ONT | Toronto loc. |
| ONT | Toronto prov. |
| ONT | Toronto's prov. |
| ONT | Toronto's province (Abbr.) |
| ONT | Toronto's province, for short |
| ONT | Toronto's province: Abbr. |
| ONT | Toronto’s prov. |
| ONT | US invasion destination of 1812 |
| ONT | Using AndroGel, e.g. |
| ONT | Using Testopel, for example |
| ONT | Western neighbor of Que. |
| ONT | What's about 150 mi. north of Duluth |
| ONT | What's superior to Lake Superior: Abbr. |
| ONT | Where Ft. Erie is |
| ONT | Where London is: Abbr. |
| ONT | Where Ottawa is: Abbr. |
| ONT | Where Stratford and Cambridge are: Abbr. |
| ONT | Where Windsor is: Abbr. |
| ONT | Windsor's home: Abbr. |
| ONT | Windsor's locale: Abbr. |
| ONT | Windsor's prov. |