Arum and Jack-in-the-pulpit

Arum noun - Any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe.

Jack-in-the-pulpit and arum are semantically related. In some cases you can replace phrase "Jack-in-the-pulpit" with "Arum", this terms are similar.

Jack-in-the-pulpit noun - Common American spring-flowering woodland herb having sheathing leaves and an upright club-shaped spadix with overarching green and purple spathe producing scarlet berries.

Arum and jack-in-the-pulpit are semantically related. You can use "Arum" instead a noun phrase "Jack-in-the-pulpit".