Initialism
/ɪˈnɪʃ.əl.ɪ.zəm/
noun — “the cousin of acronyms that refuses to be spoken as a word — it insists on spelling itself out, letter by letter.”
Acronym
/ˈæk.rə.nɪm/
noun — “the lazy typist’s dream: squeezing a mouthful of words into a handful of letters.”
Abbrev
/ˈæb.rəv/
noun — “a shortcut for when typing the full thing feels like running a marathon in molasses.”