Here are some words that look similar in spelling, but have different meanings :

a) हंगाम – season

b) हंगामा – tumult

a) लगन – devotion

b) लान – wedding

a) अन्य – another

b) अन्न – food

a) आसन्न – imminent

b) आसन – seat

a) साँस – breath

b) सास – mother-in-law

a) सूत – charioteer

b) सुत – son

a) सुकूत – virtue

b) सुकूत् – fortunate

a) नवा – new

b) नौवाँ – ninth

a) अन्यान्य – various

b) अनन्य – dedicated