22 items:
 Obedience (E) | Andrew L. Byers, 1900 |
8.7.8.7 D |
| O Calvary (E♭) | Andrew L. Byers, 1907 |
8.8.8.8 D |
| Oh, Praise the Lord! (C) | Barney E. Warren, 1900 |
8.6.11.12.4.4.4.4.4 |
| Oh, Put on Thy Beautiful Garments (A♭) | Clarence E. Hunter, 1900 |
9.8.9.8.9.9.9.8 |
| Oh, This Blessed Holy Rest (E♭) | H. R. Jeffrey, 1885 |
7.7.11.7.7.11.7.7.8.7 |
| Oh, Why Not Tonight? (E♭) | J. Calvin Bushey, 1842 |
8.8.8.5 R |
| Oh, Write Thy Law (G) | Andrew L. Byers, 1907 |
8.8.8.8 D |
| O Lord, Thou Healest Me! (C) | Barney E. Warren, 1887 |
10.6.10.6.8.6.9.6 |
| One in Christ (A♭) | Della F. Byers, 1907 |
8.7.8.7 D |
| One Lost Lamb (B♭) | Daniel O. Teasley, 1907 |
8.7.8.7 D |
| One Thing I Can Do (E) | Ora H. Teasley, 1907 |
8.6.8.6 D |
| Only an Earthen Vessel (A) | Andrew L. Byers, 1907 |
9.8.10.8 R |
| Only Jesus (E♭) | Daniel O. Teasley, 1907 |
8.7.8.7 D |
| Only One Narrow Way (E) | Birdie E. Fink, 1893 |
10.10.12.11 R |
| On to Victory (A♭) | Elisha A. Hoffman, 1894 |
7.7.6.7.7.6.7.7.7.7.11 |
| Onward, Upward (C) | Daniel O. Teasley, 1900 |
8.7.8.7 D |
| Opening Song (F) | Charles W. Naylor, 1904 |
10.7.10.7 D |
| Open Wide the Door (B♭) | Barney E. Warren, 1897 |
8.5.8.5.8.7.8.5 |
| Orwigsburg (E♭) | Elisha A. Hoffman, 1893 |
10.9.10.9 D |
| O Thou Gentle Spirit (F) | Barney E. Warren, 1893 |
8.6.8.6.6.5.8.6 |
| Our Example (G) | Clarence E. Hunter, 1907 |
10.9.10.9 D |
| Our God Is Love (B♭) | Barney E. Warren, 1888 |
8.8.8.8 D |