Adoptions rhymes with:
option's, options, options', assumptions, captions, conceptions, contraptions, corruptions, deceptions, descriptions, disruptions, egyptians, eruptions, exceptions, exemptions, inscriptions, interceptions, interruptions, misconceptions, misperceptions, option's, options, options', perceptions, preconceptions, prescriptions, presumptions, receptions, redemptions, subscriptions, transcriptions
Adoptions sounds like:
adaptations, adapting, adopting