I can't remember exactly, (I'm learning too, but I think someone in the discussions said one was archaic. איכר
in Reverso is also peasants
And https://en.m.wiktionary.org/wiki/איכר Etymology
איכר אִכָּר • (ikár) m
חַקְלָאִי • (khakla'í) (feminine חַקְלָאִית)
Agricultural: of or relating to agriculture (farming).
1 March 2019
Ok update, here's the link to the discussion I referred to: https://forum.duolingo.com/comment/22922157 , ikar is archaic/peasant but they're used interchangeably.