There are 10 13-letter words that start with 'gen'.
| generalissimo | generalizable |
| genericnesses | genitourinary |
| genotypically | genteelnesses |
| gentlemanlike | gentlepersons |
| genuflections | genuinenesses |
Note: These 10 13-letter words that start with 'gen' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with gene, gent, geni, geno, genu, gend, genr, gens, genn.
4-letter words start with 'gen' (4)