Mount, stain, moan, ants, main

maintenance 

Ante, act, net, tin, teen, ten, tame, can, came, cane, cent

Computers

Put, pets, so, mop, set

airplane

Air, plane, rain, plan, rain

fantastic

Fan, tic tac, ant, as, Stan, cat

animals

Man, alas, am, alms, an

creatures

I finally figured this game out lol

cat, eat, crate, rest, create

monsters 

I think it is just make five new words? I like more if I can. Stretch the wrinkled brain some, lol!

stem, roster, men, mons ( medical term), some, ton, son, sot

Fairies

Fair, far, air, raise, iris

that was hard

country

County, try, count, no, you

 beautiful