The reason I asked was because the word 'power' doesn't appear in the version I consider best for bible study (the NASB). The word there is translated 'authority', but I see other versions translate it power - which gives the impression of 'dunamis', supernatural miracle-working power. However the actual word used is 'exousian' which is power in the sense of having authority.
BDAG Lexicon
① a state of control over someth., freedom of choice, right
② potential or resource to command, control, or govern, capability, might, power
So Simon was wanting the authority to impart gifts. Notice that Simon was not seeking to be baptised in the Spirit. He wanted to buy the same authority (or power) as Peter had to impart the Spirit. The BoS itself is not a form of power.
Being filled and being baptized are completely different terms. One is external, the other internal.
The disciples were both filled and baptized at Pentecost. The were baptized in the Spirit and made part of the body of Christ, the church (1 Cor 12:13), and they were also also filled with the Spirit coming under His influence (Eph 5:18).
No they are not synonymous. All believers are baptized in the Spirit at conversion - it is the beleivers placement into the body of Christ.
1 Cor 12:13 "For in one Spirit we were all baptized into one body" . There is no indication of this being a repeated event. Like water baptism (which is an outward picture of this inner baptism) it is a one-off initiation event.
Being FILLED with the Spirit, however, can happen repeatedly. Eph 5:18
"but be filled with the Spirit", the tense of 'filled' is present imperative ie. be continually filled.
Peter was filled at Pentecost, he was filled again when he stood before the Sanhedrin in Acts 4:8, and filled again in Acts 4:31. Paul was filled in Acts 9:17, and again in Acts 13:9. Stephen was filled in Acts 6:3-5, and again in Acts 7:55.
What characterizes each of those filling events in scripture was not tongues, but boldness. Only one involved tongues (Pentecost), so tongues cannot be said to be a characteristic of being filled with the Spirit.
Paul's conversion took place on the Damascus Road not when he was filled with the Spirit in Acts 9:17.