Duckling.
meowing and annoying
The word "budding" describes a bush that is producing new growth or buds.
Ingurgitating means overeat or eat immodestly; is a word that starts and ends with ing.
D.A verb form that ends in -ing and acts as a noun
apex a verb form that ends in -ing and acts as an adjective
not BEING dumb
"Sucking."
Cussing
It could be malingering.
writing
Matching
x-raying