are there any synonyms with the first letter of C for struggle/strive?

[Fallingstar8]

This is my first post on this forum. I am not a English native speaker.

Could you please help me to think up some synonyms for the following words?

1. Are there any synonyms with the first letter of C for struggle/ strive?

2. Are there any synonyms with the first letter of C for Serving

3. Are there any synonyms with the first letter of P for Endeavor

Thanks

[Skrej]

[Fallingstar8]

thanks upstair friend.
I can not find any synonyms compliant with my needs in the thesaurus.

[Cerberus™]

May I ask what you need these synonyms for? Just curious.

[Fallingstar8]

for product promotion