ascertain vs tick

ascertain is not a noun while tick is a noun.

Word	Noun	Adjective	Verb	Adverb
ascertain	No	No	Yes	No
tick	Yes	No	Yes	No

ascertain (noun)	tick (noun)
	any of two families of small parasitic arachnids with barbed proboscis; feed on blood of warm-blooded animals
	a light mattress
	a mark indicating that something has been noted or completed etc.
	a metallic tapping sound

ascertain (verb)	tick (verb)
be careful or certain to do something; make certain of something	put a check mark on or near or next to
learn or discover with certainty	sew
find out, learn, or determine with certainty, usually by making an inquiry or other effort	make a clicking or ticking sound
establish after a calculation, investigation, experiment, survey, or study	make a sound like a clock or a timer