co-occurrent
coetaneous
coeval
coexistent
coexisting
coincident
coincidental
coinciding
concurrent
contemporaneous
contemporary
cooccurring
parallel
simultaneous
synchronal
synchronised
synchronized
synchronous
Uranian
cislunar
converge
explainingthe
fifty-odd
geosynchronous
jeklight
kilo-
low-earth
non-ionizing
power-assisted
radiac
tetryon
Ionic
Masonic
Miltonic
Napoleonic
Panasonic
Platonic
allophonic
avionic
bubonic
catatonic
chronic
conic
demonic
diatonic
electronic
embryonic
ganglionic
gnomonic
harmonic
hedonic
hegemonic
histrionic
hyaluronic
hydroponic
hypersonic
hypertonic
ionic
ironic
isoelectronic
isotonic
laconic
leptonic
masonic
microelectronic
miltonic
mnemonic
monophonic
neoplatonic
nucleonic
ovonic
pharaonic
philharmonic
phonic
planktonic
platonic
plutonic
pneumonic
polyphonic
propionic
sardonic
diachronic