capital of Trinidad and Tobago ca·pi·ta·loftrinidadandtobago uncommon noun 1. the capital and largest city of Trinidad and Tobago on the west coast of the island of Trinidad SynonymsPort of SpainPort-of-Spaincapital of Trinidad and Tobago Related words Broader terms national capital Parts Trinidad WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.