There are 13 words that start with 'hygr'.
| hygrostat | hygrograph |
| hygrometer | hygrophyte |
| hygrostats | hygrographs |
| hygrometers | hygrometric |
| hygrophytes | hygrophytic |
| hygroscopic | hygrophilous |
| hygroscopicity | |
Note: These 13 words that start with 'hygr' are found from the USA & Canada version of the tournament Scrabble word list.