“CLACHAN” is a valid word. — 14 points Scrabble

canal(astronomy) an indistinct surface feature of Mars once thought to be a system of channels; they are now believed to be an optical illusion
clach

canairtight sealed metal container for food or drink or paint etc.
aahexpress admiration and pleasure by uttering `ooh' or `aah'
nah
aha
anamother of the ancient Irish gods; sometimes identified with Danu
lacresinlike substance secreted by certain lac insects; used in e.g. varnishes and sealing wax
alaa flat wing-shaped process or winglike part of an organism
aal

anan associate degree in nursing
ah
ha(astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day
laa white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
ala silvery ductile metallic element found primarily in bauxite
naa silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)
aaa dry form of lava resembling clinkers

CLACHAN