insure vs tick

insure is not a noun while tick is a noun.

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

insure (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

insure (verb)	tick (verb)
be careful or certain to do something; make certain of something	put a check mark on or near or next to
protect by insurance	sew
make certain of	make a clicking or ticking sound
take out insurance for	make a sound like a clock or a timer