Invidious

One word fits in all gaps

The .... of fortune

...s within ....s

Everything was going well and then the .....s fell off

Put a spoke in somebody's ..... -------- https://youtu.be/qNwB3Gh8mfM

Put your shoulder to the ....

To reinvent the .... ------------ https://youtu.be/L2a75XjPG6w

The squeaky .... gets the grease ----------- https://youtu.be/sH46GJkORsg

Set the ...s in motion

I felt like a third ......

The trader spent his life ....ing and dealing