There are 18 words that start with 'glaci'.
| glacis | glacial |
| glacier | glaciate |
| glaciers | glacises |
| glacially | glaciated |
| glaciates | glaciered |
| glaciating | glaciation |
| glaciology | glaciations |
| glaciologies | glaciologist |
| glaciological | glaciologists |
Note: These 18 words that start with 'glaci' are found from the USA & Canada version of the tournament Scrabble word list.