Collocations for assurance - noun

absolute, categorical (BrE), clear (esp. BrE), firm, full
reasonable
further, repeated
formal, official, personal, verbal, written
He gave me his personal assurance that the vehicle was safe.

have
We now have a firm assurance of support from the government.

give sb, make, offer sb, provide
gain, get, obtain, receive
ask for, demand, need, seek, want
accept
They accepted his assurance that patients would be treated as soon as possible.

go back on
He accused the president of going back on assurances given earlier.

assurance about
an assurance about the safety of this equipment

assurance by, assurance from
assurances from the manager

despite assurances
Despite assurances from the government, the chemicals are known to be dangerous.

calm, quiet
She spoke with calm assurance.

great

have
show
Even at a very young age she showed a great deal of assurance.