certified

As verbs the difference between certified and recognised

is that certified is (certify) while recognised is (recognise).

As an adjective recognised is

notable; distinguished; honoured.

As verbs the difference between certified and duplicate

is that certified is (certify) while duplicate is to make a copy of.

As an adjective duplicate is

being the same as another; identical this may exclude the first identical item in a series, but usage is inconsistent.

As a noun duplicate is

one that resembles or corresponds to another; an identical copy.

As verbs the difference between certified and acknowledge

is that certified is past tense of certify while acknowledge is to admit the knowledge of; to recognize as a fact or truth; to declare one's belief in; as, to acknowledge the being of a god.

As a noun approval

is an expression granting permission; an indication of agreement with a proposal; an acknowledgement that a person, thing or event meets requirements.

As a verb certified is

(certify).

As verbs the difference between certify and certified

is that certify is to attest to as the truth or meeting a standard while certified is (certify).

As verbs the difference between licenced and certified

is that licenced is (licence) while certified is (certify).

As an adjective licenced

is (uk|nonstandard).

As verbs the difference between validated and certified

is that validated is (validate) while certified is (certify).

As an adjective validated

is declared or made valid.

As a verb certified

is past tense of certify.

As a noun postgraduate is

a person continuing to study in a field after having successfully completed a degree course.

As an adjective postgraduate is

those studies which take place after having successfully completed a degree course.

As verbs the difference between certified and testified

is that certified is past tense of certify while testified is past tense of testify.

As verbs the difference between legalized and certified

is that legalized is (legalize) while certified is (certify).