defragment

As a noun fragment

is fragment.

As a verb defragment is

(computing) to run a process that collects fragments]] of files and sorts them into contiguous sections on one or more hard disks or hard disk [[partition|partitions, thus speeding up file management.

As verbs the difference between defragment and recover

is that defragment is (computing) to run a process that collects fragments]] of files and sorts them into contiguous sections on one or more hard disks or hard disk [[partition|partitions, thus speeding up file management while recover is to get back, regain (a physical thing lost etc) or recover can be to cover again.

As a noun recover is

(label) recovery.

is likely misspelled.

has no English definition.

As a verb defragment

is to run a process that collects fragments of files and sorts them into contiguous sections on one or more hard disks or hard disk partitions, thus speeding up file management.

As a verb defragment is

(computing) to run a process that collects fragments]] of files and sorts them into contiguous sections on one or more hard disks or hard disk [[partition|partitions, thus speeding up file management.

As verbs the difference between optimize and defragment

is that optimize is (originally|intransitive) to act optimistically or as an optimist while defragment is (computing) to run a process that collects fragments]] of files and sorts them into contiguous sections on one or more hard disks or hard disk [[partition|partitions, thus speeding up file management.

As a noun defrayment

is the payment of charges.

As a verb defragment is

to run a process that collects fragments of files and sorts them into contiguous sections on one or more hard disks or hard disk partitions, thus speeding up file management.

As verbs the difference between defragment and defragmenter

is that defragment is (computing) to run a process that collects fragments]] of files and sorts them into contiguous sections on one or more hard disks or hard disk [[partition|partitions, thus speeding up file management while defragmenter is to defragment.