Rein in and Save for rainy day

Rein in verb - To keep from exceeding a desirable degree or level (as of expression).

Save for rainy day and rein in are semantically related. In some cases you can use "Save for rainy day" instead a verb "Rein in".

Rein in and save for rainy day are semantically related. Sometimes you can use "Rein in" instead a verb phrase "Save for rainy day".