Common suffixes:
* -less: without a face (faceless)
* -ful: full of face (faceful) - This one is less common and usually used in a playful way.
* -ed: past tense or past participle (faced)
* -ing: present participle (facing)
* -s: plural (faces)
Less common but still valid suffixes:
* -ment: action or process (facement) - Not very common, but could be used in a creative context.
* -er: one who faces (facer) - Not a common word but technically possible.
* -like: resembling a face (facelike)
The best suffix to use will depend on the meaning you want to convey.