There are 18 words that start with 'subf'.
subfix | subfile | subfusc |
subfield | subfiles | subfixes |
subfloor | subfluid | subframe |
subfuscs | subfamily | subfields |
subfloors | subfossil | subframes |
subfossils | subfamilies | subfreezing |
Note: These 18 words that start with 'subf' are found from the USA & Canada version of the tournament Scrabble word list.