If you take a look at the Coptionary, you can see that we have a list of all letters of the Coptic Alphabet through which you can browse to the words you are looking for. This index includes all different spellings of a word so that it is easy to find it regardless of what dialect you are familiar with. The word currently used as the main word for an entry is based on the decision in Crum's dictionary. If you'd like to discuss ways of looking up words here is the place to do it!