KEY: Gratuitous.
SYN: Free, uncompensated, voluntary, unwarranted, groundless, wanton,unnecessary, unsought.
ANT: Compulsory, involuntary, obligatory, necessitated, warranted,well-founded.

• Arrange
• Arrant
• Array
• Array \v
• Arrest \r
• Arrival, [See ARRIVE]
• Arrive
• Arrogance
• Arrogate
• Art
• Artful
• Articular
• Artifice
• Artificial
• Artless, [See ARTFUL]
• Ascend
• Ascendancy
• Ascertain
• Ascribe
• Askant
• Aspect
• Asperity
• Asperse
• Aspiration
• Assail, [See ASSAULT]