Romans 10:9 because if thou shalt confess the word with thy mouth that Jesus is Lord, and shalt believe in thy heart that God raised him from the dead, thou shalt be saved:
Rom 10:10 for with the heart one believeth unto righteousness; and with the mouth one confesseth unto salvation.
1: one verse does not a gospel make - one verse taken out of context does not disqualify all the other verses that teach water baptism
2: good disciples obedient to the Word confess their faith and belief in the waters of baptism
3: this is Romans chapter 10 which is after Romans chapter 6 (water baptism) and Romans chapter 8 (Holy Spirit) and the confession in chapter 10 is about these previous doctrines taught by Paul.
Acts 16:27 And the jailor being roused out of sleep and seeing the prison doors open, drew his sword and was about to kill himself, supposing that the prisoners had escaped.
16:28 But Paul cried with a loud voice, saying, Do thyself no harm: for we are all here.
16:29 And he called for lights and sprang in, and, trembling for fear, fell down before Paul and Silas,
16:30 and brought them out and said, Sirs, what must I do to be saved?
16:31 And they said, Believe on the Lord Jesus, and THOU shalt be saved and thy household.
16:32 And they spake the word of God to him, with all those in his house.
16:33 And he took them in that hour of the night, and washed their stripes; and was baptized, he and all his, immediately.
16:34 And he brought them up into the house, and set a table before them, and rejoiced greatly with all his house, having believed in God.