There are 11 words that start with 'trigo'.
| trigo | trigon |
| trigos | trigons |
| trigonal | trigonous |
| trigonally | trigonometry |
| trigonometric | trigonometries |
| trigonometrical | |
Note: These 11 words that start with 'trigo' are found from the USA & Canada version of the tournament Scrabble word list.