seven appears in definitions for these words:
A Abbreviators Accomplish Adansonia Adarme Add Admiralty Adultery Affirmative Age Alchimy Alligator Almadie Amobeum Amorpha Amphora Amyraldism Anotta Apprenticeship Apter Arbor Archilochian Arms Arpent Atche Atlantica Aum Aventine Azote Baron Bath Beg Binary Bless Blue Board Boll Bracte Bustard By Cardinal Chameleon Charless-wain Chastise Clarichord Clove Compact Compass Constable Cork Cost Cubit Cynosure Day Deacon Dear Demi-volt Diastaltic Discord Distance Dominant Dominical Drachma Drops Dwell Eighteenth Eighth Eightieth Eld Elephant Elk Empty End Epha Fairy Fight Finish For Fourteen Fructification G Gain Galley Gammut Gannet Gaper Generate Generator Genitive Guinea-pig Gurnard Halcyon Hant Have Hebdomad Hebdomadal Heptacapsular Heptachord Heptagon Heptagonal Heptagyn Heptagynian Heptahexahedral Heptamerede Heptander Heptandrian Heptangular Heptaphyllous Heptarchic Heptarchy Heptateuch Here Hill Honest Hyads Inch Insect Integer Ivory Javelin Jubilee July Lamprey Languish Leaven Libra Life Line Log Magnetize Manna Matadore Matter Mean Mercury Miscorrect Mite Moon Moss Mount Mum Musketoon Nisan None Nones Number Octave Odd Old Omentum One Opal Orion Ostrich Passy-measure Penance Pentecost Pietist Pleiads Plenteous Plenteousness Prior Purify Q Quartan Ranging Rate Reach Reconciliation Render Represent Request Rest Ruble S Sabbatarian Sabbath Sabbatic Sagene Sajene Salamander Sanctify Sanhedrim Satellite Saturn Science Sea-wolf Selectman Sennight Septangular September Septempartite Septenary Septennial Septfoil Septilateral Septinsular Septuagenary Septuagesima Septuagesimal Septuagint Septuary Septuple Serpentarius Serve Sesterce Sevenfold Sevennight Sevenscore Seventeen Seventeenth Seventh Seventhly Seventieth Seventy Sitting Six Sole Some Soul Speak Stair Stock Story Subdivide Subsemitone Subseptuple Substance Successive Synagogue Take Taxable Testoon Thick Thin Tisri To Township Trave Tree Try Upon Vatican Vital Wash Week Whig Wonder Yard Year Youth