Some seven letter words with a first letter A and the third letter I are:
Tragedy
Seventh!
possess
Oedipal
cobbler
private
Disturb, washtub.
incense, enclose, ennoble
The word is rodents.
startle
Umm, how about "shuttle"?blotterbrittlebladderchatterclattercheddarchoppedcritterdribbleflutterflatterflipperplatterplannerscannerscattershimmershippedshoppedshutterskimmerslimmerslipperslappedslippedsloppedsmittenspinnerspotterstopperstepperstammerstutterswimmertrimmer
backupsbagfulsballutebanquetbarbulebarbutsbariumsbarquesbasculebasquesbattuesbawsuntcaesuracaiquescalculicalquedcalquescanfulscanguescannulacapfulscapouchcapsulecapturecarfulscarousecasquedcasquescatgutscatsupsdasyureearfulsearmufffactualfacturefailurefavoursgangueshachurehagbushhagbutshamaulshamburghangupshatfulsjarfulskaliumslabourslabrumslacquerlacqueylangueslanguetlanguidlanguorlangurslapfulslarrupslawsuitlayoutsmagnumsmahoutsmakeupsmamluksmanhuntmantuasmaraudsmarkupsmarqueemarquesmarquismasquermasquesmaybushpablumspachucopadaukspadoukspandurapanfulsparquetpasquilpasturepayoutsracquetradiumsragoutsrapturesacbutssacculesacculisacquessacrumssagbutssambucasambukesamburssannupssanturssapourssatsumasavourssavourysawbucksawdustsaxtubataboulitabourstactualtakeupstalcumstamburatamburstarbushtartufetatouayvacuumsvaloursvalvulavalvulevapoursvapouryvasculavatfulswaesuckwafturewalkupswalnutswampumswangunswarmupswashupsyanquis