Collocations for reassure - verb

constantly
He was constantly reassuring himself that he had acted for the best.

quickly

be able to, can
help (to)
seek to, try to
hasten to
do little to, do nothing to
do a lot to, do much to (esp. BrE)
The report will do much to reassure parents of children at the school.

about
They tried to reassure the public about the safety of public transport.

of
She needed to be reassured of his love for her.

with
He reassured her with a pat on the arm.

feel reassured
Kate nodded, but she didn't feel reassured.

need reassuring
Often parents simply need reassuring that their children are happy at school.

Reassure is used with these nouns as the object:
investor