Borrow.
parted
I can't make six-letter words out of five letters. If you lend me an "i," I'll make "fossil."
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern --LEND. That is, six letter words with 3rd letter L and 4th letter E and 5th letter N and 6th letter D. In alphabetical order, they are: relend
The opposite of unusual is common.
Six letter words starting with the letter "T"ThreatThreadTinkerTimingTakingTeamedToppedTriple
little
export
reward
client
Sudden
There are no English words ending in "-six", let alone six letter words.
The six-letter word is closed.