There are 51 (not counting unusual words such as alb or ani):
ail
air
ale
ant
are
art
ate
bah
ban
bar
bat
bee
bet
bin
bit
bra
ear
eat
eel
era
ere
hat
hen
her
hie
hit
ire
lab
lee
lei
let
lie
lit
nab
nee
net
nib
nil
nit
nth
ran
rat
rib
tab
tan
tar
tea
tee
ten
the
tie
tin
Words I can make with the letter is the word 'terror' are:errerrorororeretroroerotrotetotoetore
Some three letter words that can be made from the word 'hippopotamus' are:ahiaimampaptashasphamhashathimhiphishithophumhutimpitsmapmatmoomopoatohmoutpatpippitpoipoppotpuppusputsapsatsitsopsotsouspasumsuptamtaptiptomtootopump
Some four letter words in the word Thursday are:artsdartdaysdraydusthardhurtshadshutstarstaystudthudtrayyard
Three letter words that can be made from the word OLYMPIC are:copcoyicyimpliplopmilmopoilplypoi
The two letter words that can be made from the word 'cooperate' are:atorpato
"UNMET"
two
A seven letter word from the letters in 'appliance' is pelican.
The letters can be used to spell the 9 letter word hostility and the 8 letter word hospital. They also spell the 7 letter words hastily, tastily and topsail.
There are many, but here are some examples:bagelbastebatchbathecabincachecamelcatchcaterdaddydailydairydaisydandyeagerearnseartheaselfablefacetfaintfaithfavorgablegaudygaugegaunthabithaikuharshhaunthavenjadedjauntjazzykaputkarmakayakkazoolabellaborladenlatchlatermacawmachomajormarchmarshmasonmatchnachonaivenakednannynastynavelpaganpagerpaperparchpastepatchpavedradarrabbirabidradioradonranchrazorsabersablesaintsaladsatinsavedsavortabletabootacittallytangotardytarryvaguevalidvalorvaluevalvevaporwagerwaferwaivewastewatchwaterwavedyachtyards
One seven letter word, One two letter word and a five letter word, One three letter word and a four letter word, One three letter word and two two letter words, Two three letter words, Three two letter words, A two letter word and a four letter word, A six letter word, A two letter word and a three letter word, A five letter word, Two two letter words, A four letter word, A three letter word, or A two letter word.
--- 29 words ---7 Letter wordspenguin5 Letter Wordsennuiequippennipiqueunpenunpin4 Letter Wordsninepeinpinequinquip3 Letter Wordsinnnipnunpenpiepinpiupun2 Letter Wordseninnenupepiqiun