velcro

As nouns the difference between sticky and velcro

is that sticky is a sticky note, such as a post-it note while velcro is (velcro).

As verbs the difference between sticky and velcro

is that sticky is (internet|bulletin boards) to fix a thread at the top of the list of topics or threads so as to keep it in view while velcro is (velcro).

As an adjective sticky

is able or likely to stick.