Infirmed rhymes with:
confirmed, reconfirmed, unconfirmed, affirmed, confirmed, firmed, reaffirmed, reconfirmed, unconfirmed, affirmed, confirmed, firmed, reaffirmed, reconfirmed, termed, unconfirmed
Infirmed sounds like:
impairment, imprint, imprinted, infirmity, informant, informed, invariant