Hebrew in Word only has a single Hebrew font,

MacOS comes with quite a few fonts that include Hebrew -- Arial, Arial Hebrew, Arial Unicode, Corsiva Hebrew, Courier New, Lucida Grande, New Peninim, Raanana, Tahoma, Times New Roman.

For help in getting Word to use what is already on your machine, you can try

https://answers.microsoft.com/en-us/msoffice/forum/msoffice_word-msoffice_OfH-mso_OPMac?sort=LastReplyDate&dir=Desc&tab=All&status=all&mod=&modAge=&advFil=&postedAfter=&postedBefore=&threadType=all&isFilterExpanded=false&page=1

Also see the section on Office 365 in this page

http://www.jklstudios.com

A quick internet search turned up this:

https://www.fontspace.com

I'm sure a more extensive search for "download fonts" or "buy fonts" would net you many more options.