There are 18 10-letter words that start with 'subt'.
| subtenancy | subtenants | subtending |
| subterfuge | subtextual | subtilisin |
| subtilized | subtilizes | subtilties |
| subtitling | subtleness | subtleties |
| subtotaled | subtotally | subtracted |
| subtracter | subtrahend | subtropics |
Note: These 18 10-letter words that start with 'subt' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with subti, subte, subtr, subto, subtl, subta, subth, subtu, subty.
6-letter words start with 'subt' (2)