Following are all the protonium like words, in the list below.
POSITRONIUM
100% like protonium
PIONIUM
100% like protonium
ANTIPROTON
100% like protonium
MUONONIUM
100% like protonium
ANTIDEUTERON
100% like protonium
NEUTRONIUM
100% like protonium
PARAPOSITRONIUM
100% like protonium
PROTON
100% like protonium
MUONIUM
100% like protonium
KAONIUM
100% like protonium
DIPOSITRONIUM
100% like protonium
EXOTIC ATOM
100% like protonium
PROTRON
100% like protonium
HADRONIC ATOM
100% like protonium
TAUONIUM
100% like protonium
ANTIATOM
100% like protonium
ANTIHELION
100% like protonium
ANTINEUTRON
100% like protonium
ORTHOPOSITRONIUM
100% like protonium
ANTINUCLEON
100% like protonium
DEUTERON
100% like protonium
TRITON
100% like protonium
ANTIBARYON
100% like protonium
HYPERTRITON
100% like protonium
PROTIUM
100% like protonium
ANTITRITON
100% like protonium
MESONIUM
100% like protonium
PROTON NUMBER
100% like protonium
ANTISFERMION
100% like protonium
POSITRON
100% like protonium
ANTIHYPERTRITON
100% like protonium
LEPTONIUM
100% like protonium
ANTIPION
100% like protonium
HYPERHYDROGEN
100% like protonium
ANTIHADRON
100% like protonium
QUASIPROTON
100% like protonium
EXOTIC
100% like protonium
ANTINUCLEUS
100% like protonium
ATOMIC NUCLEUS
100% like protonium
STOPONIUM
100% like protonium
ANTIHYPERON
100% like protonium
ONIUM
100% like protonium
ANTINEUTRINO
100% like protonium
PHOTOPROTON
100% like protonium
ANTIDYON
100% like protonium
BARYONIUM
100% like protonium
ANTIHYDROGEN
100% like protonium
CHARGED PARTICLE
100% like protonium
ANTIPARTON
100% like protonium
DIPION
100% like protonium
ANTITRITIUM
100% like protonium
EXOTIC BARYON
100% like protonium
SPOSITRON
100% like protonium
BARYON
100% like protonium
ANTIPARTICLE
100% like protonium
PROTEON
100% like protonium
ANTIPHOTON
100% like protonium
ANTIBOSON
100% like protonium
ANTIPREON
100% like protonium
DIPROTON
100% like protonium
HEAVY ION
100% like protonium
TRINUCLEON
100% like protonium
ANTISPARTICLE
100% like protonium
ANTIFERMION
100% like protonium
TRIPROTON
100% like protonium
ANTISPURION
100% like protonium
ANTITAUON
100% like protonium
TECHNIBARYON
100% like protonium
ANTIKAON
100% like protonium
ANTIELECTRON NEUTRINO
100% like protonium
HELIONIUM
100% like protonium
TECHNIPION
100% like protonium
EXOTIC HADRON
100% like protonium
ANTIMUONIUM
100% like protonium
COELECTRON
100% like protonium
NEGATRON
100% like protonium
ANTIHOLON
100% like protonium
ANTIDEUTERIUM
100% like protonium
ANTIHAPLON
100% like protonium
PROTO-PHOTON
100% like protonium
ANTIQUARK
100% like protonium
NUCLEUS
100% like protonium
HYPERON
100% like protonium
SPARTICLE
100% like protonium
HYPERPION
100% like protonium
ANTIMUON NEUTRINO
100% like protonium
ANTIFLUXON
100% like protonium
DEUTERIUM
100% like protonium
ANTISKYRMION
100% like protonium
ANTIELEMENT
100% like protonium
ANTIGLUON
100% like protonium
ALPHA PARTICLE
100% like protonium
PION
100% like protonium
TECHNIFERMION
100% like protonium
QUASINEUTRON
100% like protonium
NUCLEAR MAGNETON
100% like protonium
AXION
100% like protonium
ANTIGRAVITON
100% like protonium
HYPERNUCLEUS
100% like protonium
SUBPARTICLE
100% like protonium