Convenient (I just spelled it wrong and auto correct had to change it ), necessary, definitely, immediately, maintenance (this is probably the worst one for me), exercise.

Which

Recommend

necessary, embarrassed and exercise

Guarantee

Necessary, recommend, and embarrassing for me.

Also really weird story but I was in an exam once and we had to write an essay and I completely forgot how to spell "does". I spent like 20 minutes trying to remember

You did.

I used to always spell length wrong. Made me lose in tha Spelling Bee in 2nd grade

I spell everything correctly. I get some typos now and then sometimes but nothing major.
(watch me get a huge ass error right now in this post and being dragged to pits about it )

I literally thought that every time was spelled everytime until like last year because of Britney, I still forget sometimes. Also restaurant.

I used to have trouble with Mediterranean, but now I just remember it is "terra" the Latin word for earth.

Definitely is a big one for me.. I always spell it 'Defenitally' for some reason.

Manoeuvre I always leave a letter out

Available