There are a total of 175 10-letter words containing 'mal', and the number may vary in different dictionaries. You can specify the dictionary and order.

• abnormally ₂₁
• amalgamate ₁₉
• aneurismal ₁₆
• aneurysmal ₁₈
• animalcula ₂₀
• animalcule ₂₀
• animaliers ₁₅
• animalised ₁₆
• animalises ₁₅
• animalisms ₁₈
• animalists ₁₅
• animalized ₂₅
• animalizes ₂₄
• animallike ₂₀
• antifemale ₁₈
• centesimal ₁₈
• coseismals ₁₇
• decimalise ₁₈
• decimalize ₂₇
• dermatomal ₁₈
• desmosomal ₁₈
• dismalness ₁₆
• duodecimal ₂₀
• ectodermal ₁₈
• emalangeni ₁₈
• endodermal ₁₇
• entodermal ₁₆
• epididymal ₂₁
• episomally ₂₀
• exothermal ₂₃
• femaleness ₁₈
• formalised ₁₈
• formalises ₁₇
• formalisms ₂₀
• formalists ₁₇
• formalized ₂₇
• formalizer ₂₆
• formalizes ₂₆
• formalness ₁₈
• geothermal ₁₈
• grimalkins ₂₁
• hypodermal ₂₂
• informally ₂₁
• isoseismal ₁₄
• isothermal ₁₆
• lachrymals ₂₂
• malachites ₁₉
• malacology ₂₂
• maladapted ₁₉
• malaguenas ₁₈
• malaguetas ₁₇
• malaguetta ₁₇
• malapertly ₂₀
• malapropos ₂₀
• malathions ₁₇
• malaxating ₂₄
• malcontent ₁₉
• maledicted ₁₉
• malefactor ₂₀
• maleficent ₂₁
• malenesses ₁₅
• malevolent ₂₀
• malfeasant ₁₈
• malignance ₂₁
• malignancy ₂₃
• malingered ₁₈
• malingerer ₁₇
• malleefowl ₂₂
• malodorous ₁₆
• malolactic ₂₁
• malthouses ₁₇
• maltreated ₁₅
• maltreater ₁₄
• malvaceous ₂₂
• mammalians ₂₁
• marmalades ₁₈
• marmalised ₁₈
• marmalises ₁₇
• marmalized ₂₇
• marmalizes ₂₆
• maximalism ₂₇
• maximalist ₂₄
• mesodermal ₁₈
• microsomal ₂₀
• millesimal ₁₉
• minimalism ₂₁
• minimalist ₁₈
• nonoptimal ₁₉
• nonthermal ₁₈
• normalcies ₁₈
• normalised ₁₆
• normaliser ₁₅
• normalises ₁₅
• normalized ₂₅
• normalizer ₂₄
• normalizes ₂₄
• optimality ₁₉
• organismal ₁₇
• paranormal ₁₈
• paroxysmal ₂₆
• peridermal ₁₈
• permalinks ₂₂
• phagosomal ₂₁
• phantasmal ₂₀
• protonemal ₁₈
• proximally ₂₇
• rosemaling ₁₇
• sarcosomal ₁₇
• schmaltzes ₂₈
• schmalzier ₂₈
• semiformal ₂₀
• shmaltzier ₂₅
• smallgoods ₁₈
• smallmouth ₂₁
• smallpoxes ₂₅
• smallprint ₁₉
• smallsword ₁₉
• strabismal ₁₇
• submaximal ₂₈
• subminimal ₂₂
• suboptimal ₂₁
• supermales ₁₈
• taxidermal ₂₂
• thermalise ₁₆
• thermalize ₂₅
• tourmaline ₁₆
• treponemal ₁₈
• ultrasmall ₁₇
• maladroits ₁₃
• mallemucks ₂₀
• permalloys ₁₇
• subnormals ₁₄
• approximal ₂₃
• bummalotis ₁₆
• decimalism ₁₇
• decimalist ₁₅
• decinormal ₁₅
• diathermal ₁₆
• dismallest ₁₃
• embolismal ₁₆
• epithermal ₁₇
• femalities ₁₅
• formaliser ₁₅
• formaliter ₁₅
• harmalines ₁₅
• homaloidal ₁₆
• hydrosomal ₁₉
• interramal ₁₂
• isocheimal ₁₇
• isochimals ₁₇
• isocrymals ₁₇
• maladdress ₁₄
• malaxation ₁₉
• malaxators ₁₉
• maledicent ₁₅
• maleffects ₂₀
• maleficial ₁₇
• malengines ₁₃
• malentendu ₁₃
• malignants ₁₃
• malignment ₁₅
• mallanders ₁₃
• malleating ₁₃
• malleation ₁₂
• malleiform ₁₇
• mallenders ₁₃
• mallowpuff ₂₃
• malmstones ₁₄
• maltalents ₁₂
• malvoisies ₁₅
• metafemale ₁₇
• optimalise ₁₄
• optimalize ₂₃
• peristomal ₁₄
• smalminess ₁₄

There are 175 10-letter words containing mal in the well-known word game dictionary, 108 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 167 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 128 in the Words with Friends (WWF) dictionary.