smoother vs power tool

smoother and power tool both are nouns.

Word	Noun	Adjective	Verb	Adverb
smoother	Yes	No	No	No
power tool	Yes	No	No	No

As nouns, power tool is a hypernym of smoother; that is, power tool is a word with a broader meaning than smoother:

smoother: a power tool used for sanding wood; an endless loop of sandpaper is moved at high speed by an electric motor
power tool: a tool driven by a motor

smoother (noun)	power tool (noun)
a power tool used for sanding wood; an endless loop of sandpaper is moved at high speed by an electric motor	a tool driven by a motor