Glued sounds are groups of letters where the individual sounds cannot be heard clearly. They are also known as welded sounds. Glued sounds are more easily taught as "stuck together" letter groupings. They are always at the end of a syllable or word. Some examples of glued sounds include "ng" and "nk". Other glued sounds have two sounds, such as "all," "am," and "an," where the vowel "a" does not make its expected sound. In these cases, the "a" sounds more like a short "o," or it becomes nasalized when followed by an "m" or an "n". Some educators also consider the chunks "am," "an," and "all" to be part of the glued sounds family.

To teach glued sounds, it is best to separate them into two categories: two-sound and three-sound pairings. Two-sound glued sounds include "all," "am," and "an". Three-sound glued sounds include "ang," "ank," "ing," "ink," "ong," "onk," "ung," and "unk". It is recommended to focus on reading and spelling two-sound glued sounds first before introducing three-sound glued sounds. Some teaching activities for working with glued sounds include blending to read words with glued sounds, building words with glued sounds, and multi-sensory writing.