Synonyms for Catching (same or very similar meaning)
WordNet sense 1 ((of disease) capable of being transmitted by infection):
communicable, contagious, transmissible, transmittable, contractableWordNet sense 2 (easily spread):
infectiousWordNet sense 3 (the act of detecting something; catching sight of something):
detection, espial, spotting, spyingWordNet sense 4 (becoming infected):
contractingFrom the ODE community, based on WordNetadd/edit