Shutin

7 clues
Enclose
Invalid
Recluse
Confine
Confined
Withdrawn
Quarantine
Similar answers:
Aaarating
Aameeting
Aameetings
Abating
Abbreviating
Abducting
Abetting
Ablastingindisguise
Aborting
Abstinence
Abstinent
Abstinentminded
Abtesting
Abutting
Accenting
Accentinganexam
Accepting
Accidentsarewaiting
Accommodating
Accosting