I’ve got one for the bonus
Monkeys - meth
Eat - eth
Peanut - prop
Butter - bute
As for the rest I just remember it with shapes. For example a pentagon has 5 sides so it’s 5 carbons.
I’ll let you know if I come up with anything for the reactivity one. But it might help to spot the functional groups in each and see if there are any patterns. For example aldehydes are before ketone because their functional group is the end/start whereas for ketones it’s at the middle? That might confuse you even more tbh 😅
I hope this kind of helped but I’ll let you know if I think of one!!