Collocations for relaxation - noun

deep, great
complete, total
muscle, muscular
an ointment that helps muscle relaxation

mental
an environment that promotes physical and mental relaxation

aid, cause (medical), induce, promote
Some people take up yoga to aid relaxation.
drugs that cause the relaxation of the muscle
a popular herb known to induce relaxation

exercise, technique
tape
Try listening to a relaxation tape before you go to sleep.

therapy
class
He goes to relaxation classes.

for relaxation
She listens to classical music for relaxation.

relaxation from
a chance for relaxation from work

a form of relaxation, a kind of relaxation
rest and relaxation
a state of relaxation

further
general
slight
temporary (esp. BrE)
gradual

call for (esp. BrE)
Financiers are calling for a relaxation of these stringent measures.

relaxation in, relaxation of
a relaxation in the rules