There are 14 11-letter words that start with 'allo'.
| alloantigen | allocatable | allocations |
| allocutions | allografted | allographic |
| allometries | allomorphic | allopathies |
| allopatries | allopurinol | allosteries |
| allotropies | allowancing | |
Note: These 14 11-letter words that start with 'allo' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with allot, allop, alloc, allog, allow, allom, allos, allod, alloa, allon, alloy, allob, allov, allox.
5-letter words start with 'allo' (4)