Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun tampering

1 sense of tampering

Sense 1
meddling, tampering -- (the act of altering something secretly or improperly)
       => change of state -- (the act of changing something into something different in essential characteristics)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb tamper

2 senses of tamper

Sense 1
tamper, fiddle, monkey -- (play around with or alter or falsify, usually secretively or dishonestly; "Someone tampered with the documents on my desk"; "The reporter fiddle with the facts")
       => manipulate -- (hold something in one's hands and move it)

Sense 2
meddle, tamper -- (intrude in other people's affairs or business; interfere unwantedly; "Don't meddle in my affairs!")
       => intervene, step in, interfere, interpose -- (get involved, so as to alter or hinder an action, or through force or threat of force; "Why did the U.S. not intervene earlier in WW II?")