Difficulties often arise because of the similarity in sound between two or more words.
Careful differentiation is needed between, for example, ‘veil’ and ‘vale;’ ‘accept’ and ‘except;’ ‘canvas’ and ‘canvass’ and ‘compliment’ and ‘complement.’
Confusion between such pairs of words naturally leads to slipshod and faulty writing. Good usage implies grammatical correctness, a wide vocabulary and skill in the choice and arrangement of words.

This app helps you with all such pairs, so you never make the mistakes again when two words sound similar.