A five letter word that will make compound words from that list is FRONT.
day
out
day
The word "fire".
daydaylightdaybreakdaytime
Tat is a valid Scrabble word. The letter s can be placed in front or at the end of tat to spell the valid Scrabble words stat or tats.
The only English words that use the letter 'ealt' at the front or back are DEALT and MISDEALT. However, if you put a letter in front and behind 'ealt' you can spell the words fealty, health, lealty, realty, or wealth.
rebellious reliable runner
We can't be sure the answer is accurate without knowing the following words. Consign is one possibility.
No English words meet that criteria. Here are the two 9-letter words that end with front: forefront, lakefront.
Prefices (singular = prefix)
The word is "land." I realize that's not three letters.