The term 'Odd Duck' is a colloquialism used to describe someone who is different from the norm. The two crossword solutions for this term are 'WEIRDO' and 'ONER'. 'WEIRDO' is a 6 letter word that implies someone who is strange or peculiar, while 'ONER' is a 4 letter word that suggests someone who is unique or one-of-a-kind. Together, these two words paint a picture of someone who stands out from the crowd and does not conform to societal expectations.