“Minacious” should be very easy to remember as it sounds very close to its meaning “Menacing”.
“Sciolism” should remind you of someone who pretends to know a lot about “Socialism” but in reality cannot even spell it correctly let alone knowing other aspects of it.
If someone quite does you a favor, you re-quite him/her with a favor, you re-turn the favor. Remember thus!
“Autarkic” or “Autarky” should remind you of “Autonomy”-the right or condition of self-government. The idea of autarky may be thought of as an extension of autonomy.
Expand “Agit-Prop” as agitating propaganda which is used to incite people to take some action. It may be for winning an election or stirring up a revolution.
“Bodacious” should remind of someone with a great body, an athletic physique who looks attractive.
“Gerontocracy” should remind us of our great grandfathers who, as was the norm, liked to dictate the way how their successive generations should lead their lives.
“Plaudits” should remind you of “Pundits” (experts) who are praised for their knowledge and wisdom by their followers.
The “Approb-” part of “Approbation” should remind you of the word “Approval”. Easy, isn’t it?