baloty
Scrubbing.
SPINACH
B is an app for photos to make them less blurry and it's a letter in the alphabet too.
bucolic
Add the letter C to make the word coz (an archaic word for cousin).
The letter "B" or "b" comes before the letter "C" or "c".
climb crumb
Cobweb does, as does Cherub.
Confab and Cherub
The word is "buddy."
The silent letter is the letter "b" at the end. It sounds like it's pronounced "clime" but it's not.