Fortnight First-Syllable Rhymes 18 Rhymes Found Add Fortnight to Favorites Definition Thesaurus One-Syllable Rhymes 1 fort Two-Syllable Rhymes 4 forties fortnight fortnights forty Three-Syllable Rhymes 7 fortified fortifies fortify fortitude fortnightly fortyfive fortyfives Four-Syllable Rhymes 4 fortifier fortifiers fortifying forty-niner Five-Syllable Rhymes 2 fortification fortifications