Buff

Make characters more formidable by applying various statuses

Enhance

Increase character base stats

eg. increase str, dex, con, int, wis, cha

Bolster

Increase the effectiveness of character skills

eg. gain advantage to attack rolls
eg. bonuses to skill checks or saving throws

Fortify

Make a character more resistant or immune to damage or effects

eg. resistance to fire
eg. immunity to acid

Invigorate

Place positive conditions on characters

eg. apply haste
eg. effects of healing is doubled