tick vs ascertain

tick is a noun but ascertain is not a noun.

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

tick (noun)	ascertain (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

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