antimuon vs positive muon

antimuon and positive muon both are nouns.

Word	Noun	Adjective	Verb	Adverb
antimuon	Yes	No	No	No
positive muon	Yes	No	No	No

As nouns, antimuon and positive muon are synonyms defined as:

antimuon and positive muon: the antiparticle of a muon; decays to positron and neutrino and antineutrino

antimuon (noun)	positive muon (noun)
the antiparticle of a muon; decays to positron and neutrino and antineutrino	the antiparticle of a muon; decays to positron and neutrino and antineutrino