"support in this endeavor" is correct and usable in written English. You can use this phrase anytime you need to refer to providing help or assistance in some task. For example, "I want to thank everyone who has offered their support in this endeavor."
Ph.D. candidates will be offered access to the same wide range of support in this endeavor as Yale Law School currently provides to its students, alumni, and fellows who enter the law teaching market.
In a piece of campaign literature mailed out last week to members of the Hudson County party, Mr. Sires wrote that he was "interested in exploring the possibility of serving in the U.S. Congress" and was writing to ask for their "support in this endeavor".
We would like to thank the Wuhan Hospital for Psychotherapy for their support in this endeavor.
Plenty of people are in the same situation as you, so reach out to friends and family for advice and support in this endeavor.
They must certainly be supported in this endeavor, as the military-option in the short-term could empower and give moderate Sunni Arab forces a chance in the longer run.
Susan had a strong sense that she would be able to cope with the pain and remain in control during labour, and was supported in this endeavor by her midwife.
If he is to be successful, we as Americans must unite and support him in this endeavor for the long haul.
"The trust that has been given to us by the taxpayers, the citizens of this country, to support training in this endeavor is fantastic.
More generally, students are expected to make healthy, responsible choices concerning their personal use of alcohol and the University supports them in this endeavor through education and other resources.
Again, IIE-SRF has been supporting me in this endeavor.
NRDC has supported Changning in this endeavor for the past three years.
Being a terminologist, I care about word choice. Ludwig simply helps me pick the best words for any translation. Five stars!
Maria Pia Montoro
Terminologist and Q/A Analyst @ Translation Centre for the Bodies of the European Union