Yes, ease is playable
...and is worth 4 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Ease" Definition
noun
A state of rest, relaxation, or leisure: He took his ease by the pond.
Freedom from constraint or embarrassment; naturalness.
Freedom from difficulty, hardship, or effort: rose through the ranks with apparent ease.
Freedom from financial difficulty; affluence: a life of luxury and ease.
Freedom from pain, worry, or agitation: Her mind was at ease knowing that the children were safe.
idiom
At ease In a relaxed position, especially standing silently at rest with the right foot stationary: put the soldiers at ease while waiting for inspection.
At ease Used as a command for troops to assume a relaxed position.
verb-transitive
To alleviate; assuage: prescribed a drug to ease the pain.
To free from pain, worry, or agitation: eased his conscience by returning the stolen money.
To lessen the discomfort or pain of: shifted position to ease her back.
To move or maneuver slowly and carefully: eased the car into a narrow space; eased the director out of office.
To reduce the difficulty or trouble of: eased the entrance requirements.
verb-intransitive
To lessen, as in discomfort, pressure, or stress: pain that never eased.
To move or proceed with little effort: eased through life doing as little as possible.
verb
To free from something that pains, disquiets, or burdens .
To lessen the pressure or tension of especially by slackening, lifting, or shifting .
To maneuver gently or carefully .
To moderate or reduce especially in amount or intensity .