fulfil

As a verb fulfil is

(archaic) to fill up.

As verbs the difference between fulfil and complete

is that fulfil is (archaic) to fill up while complete is .

As verbs the difference between realise and fulfil

is that realise is standard spelling of from=Non-Oxford British spelling|realize|lang=en while fulfil is to fill up.

As a verb fulfil

is (archaic) to fill up.

As a noun fulfillment is

the state of being fulfilled.

As a noun taxonomy

is the science or the technique used to make a classification.

As a verb fulfil is

(archaic) to fill up.

As verbs the difference between exist and fulfil

is that exist is to be; have existence; have being or reality while fulfil is (archaic) to fill up.

Fulfil is a synonym of realize.

As verbs the difference between realize and fulfil

is that realize is to make real; to convert from the imaginary or fictitious into the actual; to bring into concrete existence; to accomplish while fulfil is to fill up.

As verbs the difference between keep and fulfil

is that keep is to continue in (a course or mode of action); not to intermit or fall from; to maintain while fulfil is (archaic) to fill up.

As a noun keep

is (obsolete) care, notice.