diff --git a/api_v3.go b/api_v3.go
index 43689dca1..617ae35ed 100644
--- a/api_v3.go
+++ b/api_v3.go
@@ -600,19 +600,19 @@ func V3API(protoParams ProtocolParameters) API {
 
 	{
 		must(api.RegisterTypeSettings(BasicBlock{},
-			serix.TypeSettings{}.WithObjectType(byte(BlockTypeBasic))),
+			serix.TypeSettings{}.WithObjectType(byte(BlockBodyTypeBasic))),
 		)
 	}
 
 	{
 		must(api.RegisterTypeSettings(ValidationBlock{},
-			serix.TypeSettings{}.WithObjectType(byte(BlockTypeValidation))),
+			serix.TypeSettings{}.WithObjectType(byte(BlockBodyTypeValidation))),
 		)
 	}
 
 	{
-		must(api.RegisterInterfaceObjects((*Block)(nil), (*BasicBlock)(nil)))
-		must(api.RegisterInterfaceObjects((*Block)(nil), (*ValidationBlock)(nil)))
+		must(api.RegisterInterfaceObjects((*BlockBody)(nil), (*BasicBlock)(nil)))
+		must(api.RegisterInterfaceObjects((*BlockBody)(nil), (*ValidationBlock)(nil)))
 
 		must(api.RegisterInterfaceObjects((*ApplicationPayload)(nil), (*SignedTransaction)(nil)))
 		must(api.RegisterInterfaceObjects((*ApplicationPayload)(nil), (*TaggedData)(nil)))
diff --git a/attestation_test.go b/attestation_test.go
index ffa40c467..7301d16cf 100644
--- a/attestation_test.go
+++ b/attestation_test.go
@@ -18,7 +18,7 @@ func TestAttestation(t *testing.T) {
 		Build()
 
 	require.NoError(t, err)
-	require.Equal(t, iotago.BlockTypeValidation, block.Block.Type())
+	require.Equal(t, iotago.BlockBodyTypeValidation, block.Block.Type())
 
 	attestation := iotago.NewAttestation(tpkg.TestAPI, block)
 
diff --git a/block.go b/block.go
index 30ae0c049..8a2279c92 100644
--- a/block.go
+++ b/block.go
@@ -39,12 +39,12 @@ var (
 	ErrCommitmentInputNewerThanCommitment = ierrors.New("a block cannot contain a commitment input with index newer than the commitment index")
 )
 
-// BlockType denotes a type of Block.
-type BlockType byte
+// BlockBodyType denotes a type of Block Body.
+type BlockBodyType byte
 
 const (
-	BlockTypeBasic      BlockType = 0
-	BlockTypeValidation BlockType = 1
+	BlockBodyTypeBasic      BlockBodyType = 0
+	BlockBodyTypeValidation BlockBodyType = 1
 )
 
 type ApplicationPayload interface {
@@ -85,7 +85,7 @@ func (b *BlockHeader) Size() int {
 type ProtocolBlock struct {
 	API         API
 	BlockHeader `serix:"0,nest"`
-	Block       Block     `serix:"1,mapKey=block"`
+	Block       BlockBody `serix:"1,mapKey=block"`
 	Signature   Signature `serix:"2,mapKey=signature"`
 }
 
@@ -312,8 +312,8 @@ func (b *ProtocolBlock) syntacticallyValidate() error {
 	return b.Block.syntacticallyValidate(b)
 }
 
-type Block interface {
-	Type() BlockType
+type BlockBody interface {
+	Type() BlockBodyType
 
 	StrongParentIDs() BlockIDs
 	WeakParentIDs() BlockIDs
@@ -346,8 +346,8 @@ func (b *BasicBlock) SetDeserializationContext(ctx context.Context) {
 	b.API = APIFromContext(ctx)
 }
 
-func (b *BasicBlock) Type() BlockType {
-	return BlockTypeBasic
+func (b *BasicBlock) Type() BlockBodyType {
+	return BlockBodyTypeBasic
 }
 
 func (b *BasicBlock) StrongParentIDs() BlockIDs {
@@ -464,8 +464,8 @@ func (b *ValidationBlock) SetDeserializationContext(ctx context.Context) {
 	b.API = APIFromContext(ctx)
 }
 
-func (b *ValidationBlock) Type() BlockType {
-	return BlockTypeValidation
+func (b *ValidationBlock) Type() BlockBodyType {
+	return BlockBodyTypeValidation
 }
 
 func (b *ValidationBlock) StrongParentIDs() BlockIDs {
diff --git a/block_test.go b/block_test.go
index feb7fd9f4..737159b6d 100644
--- a/block_test.go
+++ b/block_test.go
@@ -570,7 +570,7 @@ func TestBlockJSONMarshalling(t *testing.T) {
 		strconv.FormatUint(serializer.TimeToUint64(issuingTime), 10),
 		commitmentID.ToHex(),
 		issuerID.ToHex(),
-		iotago.BlockTypeValidation,
+		iotago.BlockBodyTypeValidation,
 		strongParents[0].ToHex(),
 		tpkg.TestAPI.Version(),
 		iotago.SignatureEd25519,
diff --git a/builder/block_builder_test.go b/builder/block_builder_test.go
index cba1b8d83..8eee86162 100644
--- a/builder/block_builder_test.go
+++ b/builder/block_builder_test.go
@@ -25,7 +25,7 @@ func TestBasicBlockBuilder(t *testing.T) {
 		Build()
 	require.NoError(t, err)
 
-	require.Equal(t, iotago.BlockTypeBasic, block.Block.Type())
+	require.Equal(t, iotago.BlockBodyTypeBasic, block.Block.Type())
 
 	basicBlock := block.Block.(*iotago.BasicBlock)
 	expectedBurnedMana, err := basicBlock.ManaCost(100, tpkg.TestAPI.ProtocolParameters().WorkScoreParameters())
@@ -42,7 +42,7 @@ func TestValidationBlockBuilder(t *testing.T) {
 		Build()
 	require.NoError(t, err)
 
-	require.Equal(t, iotago.BlockTypeValidation, block.Block.Type())
+	require.Equal(t, iotago.BlockBodyTypeValidation, block.Block.Type())
 
 	basicBlock := block.Block.(*iotago.ValidationBlock)
 	require.EqualValues(t, 100, basicBlock.HighestSupportedVersion)
diff --git a/tpkg/util.go b/tpkg/util.go
index e779cf816..5d286c081 100644
--- a/tpkg/util.go
+++ b/tpkg/util.go
@@ -700,7 +700,7 @@ func RandBlockID() iotago.BlockID {
 }
 
 // RandProtocolBlock returns a random block with the given inner payload.
-func RandProtocolBlock(block iotago.Block, api iotago.API, rmc iotago.Mana) *iotago.ProtocolBlock {
+func RandProtocolBlock(block iotago.BlockBody, api iotago.API, rmc iotago.Mana) *iotago.ProtocolBlock {
 	if basicBlock, isBasic := block.(*iotago.BasicBlock); isBasic {
 		burnedMana, err := basicBlock.ManaCost(rmc, api.ProtocolParameters().WorkScoreParameters())
 		if err != nil {