Eight letter words are quite common in the English language; here are just a few examples:
Academic - relating to academic or scholarly pursuits.
Affected - influenced or changed.
Anchored - securely fixed in place.
Ascended - to move upward.
Bastions - a stronghold or fortification.
Carnally - relating to physical rather than spiritual aspects.
Composed - made or put together.
Endowed - having a special talent or quality.
Fantasma - a ghostly spectral being.
Fascisme - an authoritarian and nationalist political ideology.
Hallowed - worthy of reverence and respect.
Harmonic - producing an agreeable, musical sound.
Hypnosis - a trance-like state.
Illusion - an unreal appearance or image.
Julienne - cutting food into thin strips.
Kaleidos - changing pattern of shapes and colors.
Lectured - teach through speaking.
Muralist - someone who paints, usually on a wall.
Paranoid - tending to be suspicious and distrustful.
Quandary - an indecisive situation.
Radioact - containing, displaying, or giving off radiation.
Sensation - a physical feeling or stimulation.
Traumatic - very distressing or disturbing.
Unbounded - indefinitely or extremely large.
Victimed - suffered harm or hardship.
Welcomed - greeted or accepted warmly.
Xenophobe - a fear of strangers or foreigners.
Yestern - of or relating to yesterday.
Zenithal - relating to the highest point or summit.