change

As a verb reconsider

is to consider a matter thought already to have been decided.

As a noun change is

(lb) change.

As nouns the difference between change and invariable

is that change is (lb) change while invariable is something that does not vary; a constant.

As an adjective invariable is

not variable; unalterable; uniform; always having the same value.

As nouns the difference between change and risk

is that change is (lb) change while risk is a possible, usually negative, outcome, eg, a danger.

As a verb risk is

to incur risk (to something).

As nouns the difference between change and distress

is that change is (lb) change while distress is (cause of) discomfort.

As a verb distress is

to cause strain or anxiety to someone.