Kangaroo word: plagiarist
Joey word: liar
Definitions in relation to their use in kangaroo words, taken from Google Dictionary, and edited for formatting.
plagiarist (noun): a person who uses another person’s ideas or work and pretends that it is his or her own.
liar (noun): a person who tells lies.
The letters L, I, A, and R found within the kangaroo word “plagiarist” arrange in the listed order to complete the joey word “liar”. While a word can have multiple definitions, in relation to their use with kangaroo words, these two words share a similar meaning: someone who falsifies something.