Words That Are Both Nouns and Verbs

http://www.enchantedlearning.com/wordlist/nounandverb.shtml

http://www.businessenglishresources.com/31-2/teachers-section/mini-lessons/pronunciation-lessons-pronunciation-changes-in-words-that-are-both-nouns-and-verbs/

https://www.engvid.com/english-resource/35-words-stress-changes-meaning/

https://www.wordstress.info/wp-content/uploads/2014/10/Stress-Pattern-Change-noun-verb-pairs.pdf