IPA: /ˈmʌltiˌætəm/
KK: /mʌltiˈætəm/
Made up of more than one atom.
The molecule is multiatom, containing several different elements.
Multiatom → It is formed from "multi-" (meaning many) and "atom" (from Greek "atomos", meaning indivisible). The word "multiatom" refers to a structure composed of many indivisible units or atoms.
Think of 'many' ('multi-') atoms coming together to form a larger structure.
No commonly confused words.