for all time
forever – used when saying that something will last or be remembered forever because it is very good or special

[TahlilGaran] Dictionary of Contemporary English ▲

always all the time, at all times, or every time:
I will always love you.
He always carries his medicine.
People will always need houses.
forever (also for ever British English) if something lasts or continues forever, it remains or continues for all future time:
Nothing lasts forever.
He seemed to think he would live forever.
permanently always, or for a very long time – used about changes that you expect to last forever. Permanently can be used with a verb or with an adjective:
His eyesight may be permanently damaged.
They decided to move to Portugal permanently.
for life for the rest of your life:
Marriage is supposed to be for life.
He was sent to jail for life.
Remarks like that can affect someone for life.
for good especially spoken forever – used to talk about a permanent change:
This time, he’s coming back for good.
Once a species dies out, it is gone for good.
for all time forever – used when saying that something will last or be remembered forever because it is very good or special:
Their deeds will be remembered for all time.
to/until your dying day for the rest of your life – used when something has affected you very deeply:
I’ll remember what he said to my dying day.

[TahlilGaran] English Thesaurus ▲