The difference between Allay and Alleviate

When used as verbs, allay means to make quiet or put at rest, whereas alleviate means to make less severe, as a pain or difficulty.

Allay is also noun with the meaning: alleviation.

check bellow for the other definitions of Allay and Alleviate

Allay as a verb (transitive):

To make quiet or put at rest; to pacify or appease; to quell; to calm.

Examples:

"to allay popular excitement"

"to allay the tumult of the passions"
Allay as a verb (transitive):

To alleviate; to abate; to mitigate.

Examples:

"to allay the severity of affliction or the bitterness of adversity"
Allay as a verb (intransitive, obsolete):

To subside, abate, become peaceful.
Allay as a verb (archaic):

To mix (metals); to mix with a baser metal; to alloy; to deteriorate.
Allay as a verb (archaic, by extension):

To make worse by the introduction of inferior elements.

Alleviate as a verb (transitive):

To make less severe, as a pain or difficulty.

Examples:

"Alcohol is often a cheap tool to alleviate the stress of a hard day."