1. (adjective) exactly alike; incapable of being perceived as different

• indistinguishable

2. (adjective) being the exact same one; not any other:

• selfsame
• very

3. (adjective) (of twins) derived from a single egg or ovum

• monovular

4. (adjective) coinciding exactly when superimposed

• superposable

1. (adjective) exactly alike; incapable of being perceived as different

• same

2. (adjective) being the exact same one; not any other:

• same

3. (adjective) having properties with uniform values along all axes

• isotropic
• isotropous

4. (adjective) coinciding exactly when superimposed

• congruent

1. (adjective) having properties with uniform values along all axes

• natural philosophy
• physics

1. (adjective) (of twins) derived from a single egg or ovum

• biovular
• fraternal

1. (adjective) exactly alike; incapable of being perceived as different

• identicalness
• identicalness
• identicalness
• identity
• identity
• identity
• indistinguishability
• indistinguishability
• indistinguishability

2. (adjective) being the exact same one; not any other:

• identicalness
• identicalness
• identity
• identity
• indistinguishability
• indistinguishability
• selfsameness

3. (adjective) (of twins) derived from a single egg or ovum

• identicalness
• identity
• indistinguishability

4. (adjective) having properties with uniform values along all axes

• identicalness
• identity
• indistinguishability