f
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The only words ending in -loxes that I could find are:
bolloxes
phloxes
Both more than one letter. I could not find a spelling of 'floxes', even in the Oxford English Dictionary.
sea
The word "fire".
No. There are no English words you can make by putting a letter in front of the word grieve.
sweed
A five letter word that will make compound words from that list is FRONT.
over
day
There is no English word with the pattern ?blip.
make.
There is no single English word that meets the criteria.
con-sign
Poke your eyes out and place it directly in front of your webcam.