Some words to place in front of 'off' to make a compound word are:
Merriam-Webster's Official Scrabble Players Dictionary includes the word offs. It is a valid Scrabble word that means to go away. It is worth 10 points in Scrabble.
Offensive, offhand, offering.
A five letter word that will make compound words from that list is FRONT.
day
The word "fire".
pick, high, do, bank
out
daydaylightdaybreakdaytime
day
We can't be sure the answer is accurate without knowing the following words. Consign is one possibility.
day
There is no English word with the pattern ?blip.
The word is "land." I realize that's not three letters.
con-sign