To change the word "detection" to "gloominess," you would change the letter "d" to "l." This substitution transforms the meaning from the act of discovering or identifying something to a state of darkness or sadness.
Dejection
Change the first "t" to a "j" - "dejection".
melancholy
Change one letter in mint to get a word meaning a place where money is made?
change the letter "r" to "d" to give fade
Decline
veers
Prefix
it is a three letter word meaning loud noise. the change one letter. from bin to the next to mean loud noise
Eight is Light
convert, replace, restyle, reverse
barren