The difference between these two nouns lies in their usage.
1. A songbook is a publication containing songs, including lyrics and chord scores, designed to help people learn and sing songs. The lyrics in the songbook can be sung, and there will be accompaniment to enhance the singing effect.
2. The poetry book mainly contains the text of the poetry, which is for reading and appreciation. The poems in the poetry book are literary genres that use highly concise language to vividly express the author's rich emotions, reflect social life in a concentrated way, and have a certain rhythm and rhyme.