There are a total of 141 7-letter words containing 'gn', and the number may vary in different dictionaries. You can specify the dictionary and order.

• agnails ₁₁
• agnates ₁₀
• agnatic ₁₃
• agnised ₁₁
• agnises ₁₀
• agnized ₂₀
• agnizes ₁₉
• agnomen ₁₄
• agnosia ₁₀
• aligned ₁₂
• aligner ₁₁
• arraign ₁₀
• assigns ₁₀
• bagnios ₁₃
• beignet ₁₃
• bigness ₁₃
• bologna ₁₄
• chignon ₁₆
• cognacs ₁₆
• cognate ₁₃
• cognise ₁₃
• cognize ₂₂
• coigned ₁₄
• coignes ₁₃
• cologne ₁₄
• condign ₁₅
• consign ₁₄
• coreign ₁₃
• cosigns ₁₃
• cygnets ₁₅
• dealign ₁₂
• deigned ₁₂
• deraign ₁₁
• designs ₁₁
• dignify ₁₆
• dignity ₁₃
• dognaps ₁₄
• dragnet ₁₁
• eggnogs ₁₄
• eloigns ₁₁
• ensigns ₁₁
• epergne ₁₃
• feigned ₁₄
• feigner ₁₃
• foreign ₁₃
• gnammas ₁₆
• gnarled ₁₂
• gnarred ₁₁
• gnashed ₁₃
• gnashes ₁₂
• gnathal ₁₃
• gnathic ₁₅
• gnawers ₁₃
• gnawing ₁₆
• gnocchi ₁₈
• gnomish ₁₅
• gnomist ₁₃
• gnomons ₁₄
• gnostic ₁₃
• hognose ₁₂
• hognuts ₁₃
• ignatia ₁₀
• igneous ₁₁
• ignited ₁₁
• igniter ₁₀
• ignites ₁₀
• ignitor ₁₀
• ignoble ₁₄
• ignobly ₁₆
• ignored ₁₁
• ignorer ₁₀
• ignores ₁₀
• ignotum ₁₄
• impregn ₁₆
• impugns ₁₇
• insigne ₁₁
• lasagna ₁₁
• lasagne ₁₁
• lignify ₁₆
• lignins ₁₂
• lignite ₁₁
• lorgnon ₁₂
• magnate ₁₃
• magneto ₁₃
• magnets ₁₃
• magnify ₁₈
• magnoon ₁₄
• magnums ₁₇
• maligns ₁₄
• mignons ₁₄
• oppugns ₁₇
• outgnaw ₁₄
• pignoli ₁₄
• pignora ₁₃
• pignuts ₁₄
• realign ₁₁
• regnant ₁₁
• reigned ₁₁
• repugns ₁₄
• resigns ₁₀
• signage ₁₂
• signals ₁₁
• signary ₁₂
• signees ₁₀
• signers ₁₀
• signets ₁₀
• signify ₁₅
• signing ₁₃
• signior ₁₀
• signoff ₁₆
• signora ₁₀
• signore ₁₀
• signori ₁₀
• signors ₁₀
• signory ₁₂
• soignee ₁₀
• spignel ₁₄
• sunsign ₁₂
• thegnly ₁₅
• tignons ₁₁
• vicugna ₁₈
• wingnut ₁₅
• beignes ₁₀
• lignans ₈
• agnamed ₁₁
• agnames ₁₀
• agnosic ₁₀
• begnaws ₁₃
• expugns ₁₇
• gnasher ₁₁
• ignaros ₈
• lignage ₉
• lignose ₈
• lignums ₁₀
• magnons ₁₀
• obsigns ₁₀
• proigns ₁₀
• rognons ₈
• sdeigne ₉
• sdeigns ₉
• signeur ₈

There are 141 7-letter words containing gn in the well-known word game dictionary, 115 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 133 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 122 in the Words with Friends (WWF) dictionary.