Merriam-Webster's Collegiate Dictionary:
hosp
hospice
hospitable
hospitably
hospital
hospitaler
hospitalet
hospitalise
hospitality
hospitality suite
hospitalization
hospitalize
hospitaller
host
hosta
hostage
hostel
hosteler
hosteller
hostelry
hostess
hostile
hostilely
hostility
hostler
hostly
hot
hot air
hot button
hot comb
hot corner
hot dog
hot flash
hot flush
hot key
hot link
hot metal
hot money
hot pants
hot pepper
hot plate
hot pot
hot potato
hot pursuit
hot rod
hot seat
hot spot
hot spring
hot springs
hot stuff
hot ticket
hot tub
hot under the collar
hot up
hot war
hot water
hot-blooded
hot-bloodedness
hot-button
hot-comb
hot-melt
hot-rod
hot-rodder
hot-tub
hot-wire
hotan
hotbed
hotblood
hotbox
hotcake
hotch
hotchpot
hotchpotch
hotdog
hotdogger
hotel
hoteldom
hotelier
hotelman
hotfoot
hothead
hotheaded
hotheadedly
hotheadedness
hothouse
hotline
hotly
hotness
hotshot
hottentot
hottie
hottish
houdini
houdon
houma
hound
hound's-tongue
