diff --git a/base/attributes.go b/base/attributes.go
index 188ae99..48df381 100644
--- a/base/attributes.go
+++ b/base/attributes.go
@@ -39,5 +39,5 @@ type Attribute interface {
 	// Tests whether two Attributes can be represented in the same pond
 	// i.e. they're the same size, and their byte order makes them meaningful
 	// when considered together
-	Compatable(Attribute) bool
+	Compatible(Attribute) bool
 }
diff --git a/base/binary.go b/base/binary.go
index 92de45b..1842cc2 100644
--- a/base/binary.go
+++ b/base/binary.go
@@ -62,9 +62,9 @@ func (b *BinaryAttribute) Equals(other Attribute) bool {
 	}
 }
 
-// Compatable checks whether this Attribute can be represented
+// Compatible checks whether this Attribute can be represented
 // in the same pond as another.
-func (b *BinaryAttribute) Compatable(other Attribute) bool {
+func (b *BinaryAttribute) Compatible(other Attribute) bool {
 	if _, ok := other.(*BinaryAttribute); !ok {
 		return false
 	} else {
diff --git a/base/categorical.go b/base/categorical.go
index c4629b1..be6d2b7 100644
--- a/base/categorical.go
+++ b/base/categorical.go
@@ -141,9 +141,9 @@ func (Attr *CategoricalAttribute) Equals(other Attribute) bool {
 	return true
 }
 
-// Compatable checks that this CategoricalAttribute has the same
+// Compatible checks that this CategoricalAttribute has the same
 // values as another, in the same order.
-func (Attr *CategoricalAttribute) Compatable(other Attribute) bool {
+func (Attr *CategoricalAttribute) Compatible(other Attribute) bool {
 	attribute, ok := other.(*CategoricalAttribute)
 	if !ok {
 		return false
diff --git a/base/dense.go b/base/dense.go
index a22eef1..cb30bde 100644
--- a/base/dense.go
+++ b/base/dense.go
@@ -180,8 +180,8 @@ func (inst *DenseInstances) addAttributeToAttributeGroup(newAttribute Attribute,
 	id := inst.agMap[ag]
 	p := inst.ags[id]
 	for i, a := range p.Attributes() {
-		if !a.Compatable(newAttribute) {
-			return AttributeSpec{-1, 0, nil}, fmt.Errorf("Attribute %s is not compatable with %s in pond '%s' (position %d)", newAttribute, a, ag, i)
+		if !a.Compatible(newAttribute) {
+			return AttributeSpec{-1, 0, nil}, fmt.Errorf("Attribute %s is not Compatible with %s in pond '%s' (position %d)", newAttribute, a, ag, i)
 		}
 	}
 
diff --git a/base/float.go b/base/float.go
index fe2d66c..efb4551 100644
--- a/base/float.go
+++ b/base/float.go
@@ -18,9 +18,9 @@ func NewFloatAttribute(name string) *FloatAttribute {
 	return &FloatAttribute{name, 2}
 }
 
-// Compatable checks whether this FloatAttribute can be ponded with another
+// Compatible checks whether this FloatAttribute can be ponded with another
 // Attribute (checks if they're both FloatAttributes)
-func (Attr *FloatAttribute) Compatable(other Attribute) bool {
+func (Attr *FloatAttribute) Compatible(other Attribute) bool {
 	_, ok := other.(*FloatAttribute)
 	return ok
 }
diff --git a/base/util_instances.go b/base/util_instances.go
index 75c908f..ab95efe 100644
--- a/base/util_instances.go
+++ b/base/util_instances.go
@@ -239,9 +239,9 @@ func SampleWithReplacement(from FixedDataGrid, size int) FixedDataGrid {
 	return NewInstancesViewFromRows(from, rowMap)
 }
 
-// CheckCompatable checks whether two DataGrids have the same Attributes
+// CheckCompatible checks whether two DataGrids have the same Attributes
 // and if they do, it returns them.
-func CheckCompatable(s1 FixedDataGrid, s2 FixedDataGrid) []Attribute {
+func CheckCompatible(s1 FixedDataGrid, s2 FixedDataGrid) []Attribute {
 	s1Attrs := s1.AllAttributes()
 	s2Attrs := s2.AllAttributes()
 	interAttrs := AttributeIntersect(s1Attrs, s2Attrs)
diff --git a/knn/knn.go b/knn/knn.go
index fd5bd5a..7831679 100644
--- a/knn/knn.go
+++ b/knn/knn.go
@@ -46,8 +46,8 @@ func (KNN *KNNClassifier) Predict(what base.FixedDataGrid) base.FixedDataGrid {
 		panic("unsupported distance function")
 
 	}
-	// Check compatability
-	allAttrs := base.CheckCompatable(what, KNN.TrainingData)
+	// Check Compatibility
+	allAttrs := base.CheckCompatible(what, KNN.TrainingData)
 	if allAttrs == nil {
 		// Don't have the same Attributes
 		return nil