The phrase "additional motive" is correct and usable in written English.
It can be used when discussing extra reasons or incentives behind a decision or action.
Example: "While the primary motive for the project was profit, there was also an additional motive related to community engagement."
Alternatives: "extra reason" or "further incentive".
"Most murders, there's an additional motive to it.
Actually, after months of staying in a friend's small apartment, she had an additional motive.
Bond girls are also killed to give 007 an additional motive to go after the bad guy.
NBC gets around that anachronism by adding an additional motive borrowed from "The Closer," a TNT show also inspired by the British "Suspect".
And London has an additional motive for making it hard for Wales to claim European money: the more money is spent in Wales, the less the British government can claim in rebate from Europe.In this section Preach what you practise?
There was an additional motive for the noncolor scheme as well: we wanted to evoke and update the work of earlier photographers who followed ironworkers into the city's upper margins.
But it may have additional motives.
The officials said investigators were still looking into additional motives, including possible workplace tensions over religion.
Correlations among smoking and levels of wealth, self-esteem and family relationships prove that there are additional motives besides money influencing the decision to smoke.
Lynn O'Shaughnessy acknowledges that colleges with optional testing policies are seeking a more holistic approach to admissions, but gets to the point quickly: "Cynics cite additional motives".
Though Sheriff Morgan said additional motives might yet emerge, the local state attorney, William Eddins, said at the news conference: "There are obviously a lot of loose ends to tie up, but we believe that this concludes the major part of our investigation.
