Fix up and Make up for

Fix up verb - Make arrangements for.

Make up for and fix up are semantically related In some cases you can use "Make up for" instead a verb "Fix up".

Make up for verb - To balance with an equal force so as to make ineffective.

Fix up and make up for are semantically related in fix topic. Sometimes you can use "Fix up" instead a verb "Make up for", if it concerns topics such as correct a situation.