The phrase "alternative reasons" is correct and usable in written English.
You can use it when discussing different explanations or justifications for a particular situation or decision.
Example: "There may be alternative reasons for her sudden departure that we are not aware of."
Alternatives: "different explanations" or "other justifications".
Privately, others speculated on alternative reasons for the last-minute change of royal heart.
Thus alternative reasons for the enhanced deposition rate during c-HiPIMS deposition of metal films are discussed.
In 2012, Tennessee passed a law encouraging teachers to present alternative reasons for climate change, even though those views are not supported by science.
In case after case, judges excuse blatantly discriminatory comments as mere "stray remarks" and strain to find alternative reasons that older workers were fired.
To be sure, one of the two alternative reasons given by the Court for its ruling in Jones v. United States, 362 U.S. 257, 80 S.Ct.
The court notes in passing that the Stockholders would have required the Board to account for alternative reasons for the price increase, such as investor optimism regarding a general recovery in equity markets.
The USCG cited topside damage as a reasonable alternative reason for the Fitzgerald sinking and surmised that damage to the fence rail and vents was possibly caused by a heavy floating object such as a log.
Keith Graham (Letters, 21 October) suggests an alternative reason for Patrick Gordon Walker's 1964 Smethwick defeat.
However, his alternative reason throws more light on his ambitions: "It's also the first human love story". Fig leaves are only a few removes from loincloths.
And it offered an alternative reason for the rise in deaths at the time – most could be attributed to an intestinal infection common in hospitals.
However, an alternative reason can be the limited internalization of policies, so that these are only implemented to a minimum level to attain benefits or avoid penalties.
