There are 15 words that start with 'noct'.
| noctuid | noctule |
| nocturn | noctuids |
| noctules | noctuoid |
| nocturne | nocturns |
| noctiluca | nocturnal |
| nocturnes | noctilucas |
| nocturnally | noctambulist |
| noctambulists | |
Note: These 15 words that start with 'noct' are found from the USA & Canada version of the tournament Scrabble word list.