Here are some other options, depending on the specific context:
* Pagpapatunay (pronounced pahg-pah-pah-too-nay) - This refers to "manifestation" as proof or evidence.
* Pagpapakita ng sarili (pronounced pahg-pah-pah-kee-tah nahng sah-ree-lee) - This means "manifestation of oneself," and refers to making one's presence or existence known.
* Pagpapakita ng kapangyarihan (pronounced pahg-pah-pah-kee-tah nahng kah-pang-yah-ree-han) - This means "manifestation of power," and refers to the act of demonstrating one's power or influence.
The best translation will depend on the specific context in which you are using the word "manifestation."