inquiry, problem

QUESTION
List of words for the clue inquiry, problem from the crossword:
TRACER EHS ENQUIRY ACNE EGO WHY WHA RESEARCH QUERY PROBE INVESTIGATION INQUEST HOW ASK SMOG SNAG LEAK APNEA ODOR
WordClue
DOUBTquestion, consideration
ISSUEquestion, topic
TOPICquestion, inquiry
MOTIONquestion, doubt
COMPLEXproblem
INQUIRYquestion, problem
PROBLEMquestion, inquiry
SUBJECTquestion, motion
NAIVETYinnocence
CURIOSITYinquisitiveness