WordNet sense 1 (having or showing interest; especially curiosity or fascination or concern):

interested

WordNet sense 2 (beyond or deviating from the usual or expected):

funny, odd, peculiar, rum, rummy, singular

WordNet sense 3 (being definitely out of the ordinary and unexpected; slightly odd or even a bit weird):

strange, unusual

WordNet sense 4 (offensively curious or inquisitive):

nosy, prying

WordNet sense 5 (showing curiosity):

inquisitive, questioning