Each answer is made up of two words. The words are identical with the exception of one letter. All words are six letters.

Example: a famous castaway becomes a pointer: Ginger -> Finger

-1. a superhero turns into someone who collects money from illicit activities.
-2. an ancient "book" turns into a promenade
-3. sauce making step becomes an adder?
-4. a fall becomes a street fight
-5. a seed becomes an animal shelter
-6. a prop turns into a catch
-7. a group of posts becomes a danger
-8. brood becomes a skiers delight
-9. missing becomes approval
-10. an excited state of aggitation turns to languish

5. fennel kennel

2. scroll -> stroll

1.Batman/Bagman

Robert, close but not quite.

Sondi and Haroula

3. simmer summer

4. tumble rumble

10. dither - wither

7. thread / threat

5. kernel/kennel

Yes

9. absent/assent

6. crutch/ clutch

Good ones ladies!

8. ponder/powder