a word that sounds the same or is spelled the same as another word but has a different meaning

"No" and "know" are homonyms. no 和 know 是同音异义词。

"Bow" (= bend at the waist) and "bow" (= weapon) are also homonyms. 意为鞠躬的 bow 和意为武器的 bow 也是同形异义词。