A term for words that change pronunciation with part of speech

Solution 1:

According to Wikipedia, this phenomenon is called the initial-stress-derivation , where the noun is an initial-stress-derived noun.

• Initial-stress derivation is a phonological process in English, wherein stress is moved to the first syllable of any of several dozen verbs when they become nouns or adjectives. (This is an example of a suprafix.) It is gradually becoming more standardized in some English dialects, but is not present in all, and the list of affected words differs from area to area, and whether a word is used metaphorically or not. At least 170 verb-noun (or adjective) pairs exist. Some examples are:

  • conflict, as a verb, "I hope that won't conflíct in any way." as a noun, "There will be no cónflict."
  • record, as a verb, "Remember to recórd the show!". as a noun, "I'll keep a récord of that request."
  • permit, as a verb, "I won't permít that." as a noun, "We already got a pérmit."

Solution 2:

These are a type of Homograph. The two pronunciations represent very closely related, but distinct, meanings.