WordNet sense 1 (the process whereby a person concentrates on some features of the environment to the (relative) exclusion of others):

attention

WordNet sense 2 (being present (at meeting or event etc.)):

attendant

WordNet sense 3 (spatial sense; being or existing in a specified place):

present

WordNet sense 4 (serving attendance on someone):

ministrant, ministering

WordNet sense 5 (providing assistance or serving a useful function):

helpful

WordNet sense 6 (the act of being present (at a meeting or event etc.)):

attendance