There are 17 words that start with 'infect'.
| infect | infects |
| infected | infecter |
| infector | infectant |
| infecters | infecting |
| infection | infective |
| infectors | infections |
| infectious | infectivity |
| infectiously | infectivities |
| infectiousness | |
Note: These 17 words that start with 'infect' are found from the USA & Canada version of the tournament Scrabble word list.