strickle vs smoothen

strickle is a noun but smoothen is not a noun.

Word	Noun	Adjective	Verb	Adverb
strickle	Yes	No	Yes	No
smoothen	No	No	Yes	No

strickle (noun)	smoothen (noun)
a tool used in a foundry to shape a mold in sand
a tool or rod used to level off grain or other granular material that is heaped in a measure
an implement for sharpening scythes

strickle (verb)	smoothen (verb)
smooth with a strickle	become smooth
level off with a strickle in a measuring container	make smooth or smoother, as if by rubbing
	make (a surface) shine