downcast
downgrade
downhearted
downhill
downplay
downside
downsize
downspout
downtime
downtown
downtrend
downtrodden
downwind
Some examples of compound words starting with "down" include:
houseboathouseboyhousebreakhousemaidhouseholdhousebrokenhousecoathousewareshouseworkhousecleaninghousewifehouseplanthousematehousetophousewarming
homeworkhomebodyhometownhomeboyhomelandhomespunhomecoming'homemakerhomemadehomesteadhomestretchhomesickhomeroom
Fingernail, fingertip, fingerprint.
As both "down" and "wind" are words, then downwind is a compound word.
Three such words are laptop, lapboard and lapdog.
butterflyCompound words starting with b:backbitebackdropbackfieldbackfirebackgroundbackhandbacklashbacklogbacksidebackslidebackspinbackstopbackstretchbackstrokebacktrackbackwardbackwashbackwaterbackwoodsbagpipeballroombandwagonbankbookbankrollbarnstormbarnyardbarroombartenderbaseballbaseboardbathroombeachcomberbeachheadbedriddenbedrockbedrollbedspreadbedtimebeelinebellhopbillboardbillfoldblacklistblackmailblacktopblockbusterbloodsuckerbobcatbobtailbookmobileboxcarbrainstormbrainwashbreakfastbrickbatbridgeheadbriefcasebroadcastbrotherhoodbuckshotbuckskinbucktoothbugbearbulldogbulldozerbullfrogbullheadedbullpenbuttercupbutterfingersbutterflybuttermilkcapsize
Compound words starting with D:DanceableDaredevilDarkroomDartmouthDeadlineDealershipDeckhandDeerskinDeerstalkerDesktopDewberryDillydallyDinnertimeDinnerwareDirtballDishclothDishpanDishragDishtowelDishwareDishwasherDishwaterDixielandDocklandDocksideDockworkerDockyardDogcartDogcatcherDogfightDogfishDoggoneDoghouseDoglegDogsledDogtrotDogwoodDollhouseDoorhandlesDoorjambDoorknobDoormanDoormatDoorplateDoorpostDoorwayDooryardDotsonDovetailDownbeatDowncastDownfallDowngradeDownlandDownloadDownpipesDownplayDownpourDownstairsDowntimeDowntownDownturnDownwardDrawableDrawbackDrawbridgeDrawcordDrawstringDreamboatDreamlandDreamlessDreamlikeDreamworldDressmakerDressmakingDrillmasterDrinkableDrivewayDrugstoreDrumstickDrywallDuckbillDuckboardsDuckpinsDuckpondDucktailDuckweedDumbbellDumbfoundDumbstruckDumbwaiterDustbinDustcartDustcoverDustlessDustmanDustmenDustpanDustsheet
namedropnameplatenamesake
gunpowder
earlobeearmarkearpieceearplugearringearshotearthwormedgewiseeggshellendgameendpointentrywayevenhandedeverydayevermoreeveryplaceeveryoneeverythingeverywhereeyeballeyebroweyeglasseseyelasheyelinereyepieceeyesore
cakewalk
bandaid
firearmfirebrickfirebreakfireballfirecrackerfireguardfiresidefirestormfirepowerfirehousefirefightfirelightfireplugfiretrapfirewaterfiresafefireflyfiremanfiremenfireplacefireprooffiretruckfirewallfirewoodfireworks
Fallback is a compound word. Falloff and fallout are compound words.
goodness
zookeeper
landlordlandminelonghandlookout