There are a total of 188 9-letter words containing 'rh', and the number may vary in different dictionaries. You can specify the dictionary and order.

• airheaded ₁₃
• arhatship ₁₆
• arhythmia ₁₈
• arhythmic ₂₁
• barhopped ₂₁
• beerhalls ₁₆
• beerhouse ₁₅
• berhyming ₂₂
• biorhythm ₂₁
• catarrhal ₁₅
• cirrhoses ₁₄
• cirrhosis ₁₄
• cirrhotic ₁₇
• dakerhens ₁₇
• deerhound ₁₅
• diarrheal ₁₃
• diarrheas ₁₂
• diarrheic ₁₅
• diarrhoea ₁₂
• eurhythmy ₂₁
• gearheads ₁₄
• gonorrhea ₁₄
• hoarhound ₁₆
• logorrhea ₁₄
• menorrhea ₁₅
• monorhyme ₂₀
• motorhome ₁₇
• overhands ₁₇
• overhangs ₁₈
• overhasty ₁₇
• overhated ₁₆
• overhates ₁₅
• overhauls ₁₇
• overheads ₁₆
• overheaps ₁₈
• overheard ₁₆
• overhears ₁₅
• overheats ₁₅
• overholds ₁₇
• overhoped ₁₉
• overhopes ₁₈
• overhunts ₁₇
• overhyped ₂₁
• overhypes ₂₀
• pararhyme ₁₉
• parhelion ₁₆
• perhapses ₁₇
• poorhouse ₁₅
• powerhead ₁₈
• pyorrheas ₁₆
• pyorrhoea ₁₆
• rhabdomes ₁₈
• rhachides ₁₇
• rhachises ₁₆
• rhamnoses ₁₅
• rhamnuses ₁₆
• rhapsodes ₁₅
• rhapsodic ₁₈
• rhatanies ₁₂
• rheobases ₁₄
• rheometer ₁₄
• rheostats ₁₁
• rhetorics ₁₄
• rheumatic ₁₈
• rheumatiz ₂₄
• rheumiest ₁₅
• rhinoceri ₁₅
• rhizobial ₂₄
• rhizobium ₂₇
• rhizoidal ₂₂
• rhizomata ₂₃
• rhizopods ₂₄
• rhizotomy ₂₅
• rhodamine ₁₆
• rhodamins ₁₆
• rhodolite ₁₃
• rhodonite ₁₃
• rhodopsin ₁₆
• rhomboids ₁₈
• rhombuses ₁₈
• rhoticity ₁₆
• rhumbaing ₂₁
• rhymeless ₁₇
• rhymester ₁₆
• rhyolites ₁₄
• rhyolitic ₁₇
• rhythmics ₂₁
• rhythmist ₁₈
• rhythmize ₂₇
• rhytidome ₁₇
• scirrhous ₁₅
• seborrhea ₁₄
• spearhead ₁₅
• stairhead ₁₂
• superheat ₁₅
• superhero ₁₅
• superhets ₁₅
• superhits ₁₅
• superhype ₂₀
• underhand ₁₆
• underhung ₁₈
• warhorses ₁₄
• waterhens ₁₅
• waterhole ₁₅
• boarhound ₁₅
• carhopped ₁₉
• cirrhosed ₁₅
• misrhymed ₂₀
• mycorhiza ₂₈
• nonrhotic ₁₄
• overhonor ₁₅
• pyorrheal ₁₇
• rhabdomal ₁₇
• rheobasic ₁₆
• rheologic ₁₅
• rheophile ₁₇
• rheotaxes ₁₉
• rheotaxis ₁₉
• rhigolene ₁₃
• rhinology ₁₆
• rhombical ₁₈
• rhonchial ₁₇
• rhotacism ₁₆
• riverhead ₁₆
• scirrhoid ₁₅
• underhair ₁₃
• underheat ₁₃
• waterhead ₁₆
• afterheat ₁₅
• catarhine ₁₄
• deerhorns ₁₃
• enrheumed ₁₅
• epirrhema ₁₆
• floorhead ₁₆
• forhailed ₁₆
• forhailes ₁₅
• forhooied ₁₆
• forhooies ₁₅
• forhooing ₁₆
• forhowing ₁₉
• frithborh ₂₀
• hoarheads ₁₆
• monorhine ₁₄
• otorrhoea ₁₂
• overhaile ₁₅
• overhairs ₁₅
• overhaled ₁₆
• overhales ₁₅
• overhappy ₂₂
• overhaste ₁₅
• overhents ₁₅
• parhypate ₁₉
• parrhesia ₁₄
• pyorrheic ₁₉
• rearhorse ₁₂
• rhabdoids ₁₆
• rhabduses ₁₅
• rhachilla ₁₇
• rhachitis ₁₇
• rhamphoid ₂₀
• rhaphides ₁₈
• rhapontic ₁₆
• rheochord ₁₈
• rheocords ₁₅
• rheometry ₁₇
• rheotomes ₁₄
• rheotrope ₁₄
• rhetorise ₁₂
• rhetorize ₂₁
• rhinolith ₁₅
• rhipidate ₁₅
• rhipidion ₁₅
• rhipidium ₁₇
• rhizocarp ₂₅
• rhizocaul ₂₃
• rhodanate ₁₃
• rhodanise ₁₃
• rhodanize ₂₂
• rhodinals ₁₃
• rhoeadine ₁₃
• rhopalism ₁₆
• rhotacise ₁₄
• rhotacist ₁₄
• rhotacize ₂₃
• rhubarbed ₁₇
• rhythmise ₂₀
• superhigh ₁₈
• superhive ₁₇

There are 188 9-letter words containing rh in the well-known word game dictionary, 118 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 185 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 104 in the Words with Friends (WWF) dictionary.