synthetical

As adjectives the difference between compositive and synthetical

is that compositive is having the quality of entering into composition; compounded while synthetical is synthetic.

As adjectives the difference between synthetical and null

is that synthetical is synthetic while null is having no validity, "null and void.

As a noun null is

a non-existent or empty value or set of values.

As a verb null is

to nullify; to annul.

As a noun terms

is .

As an adjective synthetical is

synthetic.