adequate, effective, proper, sufficient
Does the procedure provide adequate safeguards against corruption?

appropriate, necessary
added, additional, extra, further
inadequate
environmental, nuclear
constitutional, democratic, legal, procedural

implement, introduce (BrE), put in place
provide
provide sb with
build in, build into sth, include
Appropriate safeguards would have to be built into the procedures to avoid abuses.

be in place
The elections will go ahead, provided that adequate safeguards are in place.

safeguard against
The credit agreement includes a safeguard against overcharging.

safeguard for
Any agreement must provide safeguards for minority rights.

adequately, properly
This legislation does not adequately safeguard the rights of consumers.

be necessary to
help (to)
be designed to, be intended to, be meant to, be supposed to
take steps to

against
We must take steps to safeguard our environment against these threats.

from
Try to safeguard the young plants from frost.

Safeguard is used with these nouns as the object:
environment, heritage, information, integrity, interest, job, liberty, privacy, right, viability