“SNIBBING” is a valid word. — 13 points Scrabble

signa perceptible indication of something not immediately apparent (as a visible clue that something has happened)
singdeliver by singing
binsa container; usually has a lid
innsa hotel providing overnight lodging for travelers
ibiswading birds of warm regions having long slender down-curved bills
nibsthe writing point of a pen
bigs
ginsstrong liquor flavored with juniper berries
bibstop part of an apron; covering the chest
nisinot final or absolute
gibsa unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes
snib
sibb

bigabove average in size or number or quantity or magnitude or extent
sinestrangement from god
inna hotel providing overnight lodging for travelers
bina container; usually has a lid
ginstrong liquor flavored with juniper berries
insan agency in the Department of Justice that enforces laws and regulations for the admission of foreign-born persons to the United States
bibtop part of an apron; covering the chest
bis
giba unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes
nibthe writing point of a pen
siba person's brother or sister

ishave the quality of being; (copula, used with an adjective or a predicate noun)
ina unit of length equal to one twelfth of a foot
sia tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
bia heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metals

SNIBBING