halloween

As an adjective hallowed

is consecrated or sanctified; sacred, holy.

As a verb hallowed

is past tense of hallow.

As a noun Halloween is

the eve of All Hallows' Day; 31st October; celebrated (mostly in the United Kingdom, Canada, United States and Ireland) by children going door-to-door in costume and demanding candy with menaces.

As a noun Halloween

is the eve of All Hallows' Day; 31st October; celebrated (mostly in the United Kingdom, Canada, United States and Ireland) by children going door-to-door in costume and demanding candy with menaces.

As a verb hear is

to perceive sounds through the ear.

As nouns the difference between halloween and easter

is that halloween is the eve of All Hallows' Day; 31st October; celebrated (mostly in the United Kingdom, Canada, United States and Ireland) by children going door-to-door in costume and demanding candy with menaces while Easter is a Christian feast commemorating the resurrection of Christ; the first Sunday following the full moon that occurs on or next after the vernal equinox, neither earlier than March 22 nor later than April 25.

As an adjective easter is

eastern.

As nouns the difference between halloween and christmas

is that halloween is the eve of All Hallows' Day; 31st October; celebrated (mostly in the United Kingdom, Canada, United States and Ireland) by children going door-to-door in costume and demanding candy with menaces while Christmas is christmas Day, the day it is celebrated, 25 December, an English quarter day.

As a proper noun Christmas is

a widely celebrated festival commemorating the birth of Jesus Christ, incorporating various Christian, pre-Christian and secular customs.

As nouns the difference between hello and halloween

is that hello is "Hello!" or an equivalent greeting while Halloween is the eve of All Hallows' Day; 31st October; celebrated (mostly in the United Kingdom, Canada, United States and Ireland) by children going door-to-door in costume and demanding candy with menaces.

As an interjection hello

is A greeting (salutation) said when meeting someone or acknowledging someone’s arrival or presence.

As a verb hello

is to greet with "hello".