Fill in the blanks to complete each word. Each set of fillings will be related.

1. e--der--l
--pro---abl-
---w-lwor-
--rt-c-la--

-2. s--pco---
-ous-p--en-
-o---e-
-up---m--t

3. -et---t-r
po--g--ph
de-----te
fa---io--

4. -r-e-ho--e
sub---u-e-
c--ian---
---rmi--d--

5. ---cu--te-
-ris---
o-c---ate-
--at-r—ze

2.
slipcover (liver)
houseparent (heart)
lounges (lungs)
supplement (spleen)

Great solve, michele!

I knew one answer and had to confirm that the second 'insert' was actually potentially part of the set.
I will have to spend a bit more time trying to winkle out the other two.
So at this stage its half a solve and might help others

3. polygraph (lyra)
facetious (cetus)

I think I know one of the words for #4 but I can't figure out any others at all to see if I can come up with a related set.