Definitions in relation to their use in these kangaroo words, taken from Google Dictionary, and edited for formatting.
Kangaroo word: convent
Joey word: coven
convent (noun): a Christian community under monastic vows, especially one of nuns.
coven (noun): a group or gathering of witches who meet regularly.
The letters C, O, V, E, and N found within the anti-kangaroo word “convent” arrange in the listed order to complete the joey word “coven”. While a word can have multiple definitions, in relation to their use with kangaroo words, these two words share an opposite meaning: a group of nuns vs. a group of witches.