Word families are groups of words that have a common feature or pattern. They have some of the same combinations of letters in them and a similar sound.
For example : at, cat, hat, and fat are a family of words with the at sound and letter combination in common.
The 37 most common word families in English (according to Wylie and Durrell) are : ack, ain, ake, ale, all, ame, an, ank, ap, ash, at, ate, aw ay, eat, ell, est, ice, ick, ide, ight, ill, in, ine, ing, ink, ip, it, ock, oke, op, ore, ot, uck ,ug, ump, unk.
The following is a list of the most common words in English ending in ood.