Made mistake and don't feel that the word 'Sorry' is enough to apologize, then here are some alternative words for Sorry, which you can use instead of Sorry.
1. I take full responsibilityI take full responsibility is an alternative phrase for sorry, and it means that you know your mistake and takes full responsibility for it. Example: I take full responsibility for my actions that went wrong.
2. RegretfulRegretful is the word that shows that you feel sorry about something. Example: I am so regretful for what I said, I assure you it won't happen again.
3. I should not haveI should not have is used to express that you regret committing a mistake and know that you should have done something else instead.Example: I should not have driven during the storm.
4. Oops!Oops is used to show recognition of a mistake or minor accident, often as part of an apology.Example: Oops, I dropped your clothes.
5. Excuse meExcuse me, used as a polite apology in various contexts, such as when attempting to get someone's attention, asking someone to move so that one may pass, or interrupting a speaker.Example: Excuse me to sound off, you're not right.