adjective
Capable of forming something.
Of or pertaining to the formation and subsequent growth of something.
(education) Of a form of assessment: used to guide learning rather than to quantify educational outcomes.
noun
A thing which causes formation to occur.
A language unit, typically a morph, that has a morphological function (that is, forming a word from a root or another word).
Synonym of derivative (“a word that derives from another one”).