Maybe "formal"?
Or "uniform"?
Or "formule", for "form mule"? :-)
dict.org to the rescue!
Wow, "dict -S", been using dict for a while, but I had no idea... there's Soundex and even Levenshtein in there?!?
$ dict -m -s substring form
So, what about "Formyl"? Or "Conformist"?