There are 19 words that start with 'acar'.
| acari | acarid | acarus |
| acarids | acarine | acaroid |
| acarbose | acaridan | acarines |
| acarpous | acarboses | acariases |
| acariasis | acaricide | acaridans |
| acarology | acaricidal | acaricides |
| acarologies | ||
Note: These 19 words that start with 'acar' are found from the USA & Canada version of the tournament Scrabble word list.