Here are the longest words that can be made:
biscuit
bustic
cubist
cubiti
cubits
cubit
cutis
ictus
bits
bust
buts
cist
cubs
cuts
ibis
scut
stub
suit
tics
tubs
tuis
table, alive, exact, field, harem
Using the letters abcdefg you can spell a few 5 letter words. Badge, caged and faced are words spelled using the letters abcdefg.
Words with that combination of letters are oil, lie, lire, lore, and roil. This list has 5 words.
The longest words are 5 letters: curve, creme, and revue.
No 7 letter words there. 5 letters is the best you can do: arena or anear
zero, because wild only has 4 letters!
Samba is the only 5 letter word you can make with those letters
It would depend on the letters in the word. The theoretical maximum is 325 words from 5 different letters: 120 five-letter words, 120 four-letter words, 60 three-letter words, 20 two-letter words, 5 one-letter words (including acronyms) made by listing the letters in every possible order (abcde, abced, ..., edcba and ending with a, b, c, d, e). For most sets of 5 letters, the number is a fraction of that, from 20 to 40 words.
I found 8: befit, bleat, built, fable, fault, fetal, flute, table,
There is no 5-letter English word using the letters THRIK. The letters can spell the shorter words irk, hit, kit, and kith.
The 7 letters LCRAEPP can spell "clapper", and many other words, some 5 and 6 letter words are :parcelcarpelrappelplacercaperclearpalerapplepacerpaperpearlplacerecap
Some five letter words from the letters in documents are:centscodescoedscomescometconescount