Dictionary.com
Thesaurus.com

similar vs. similarly

[sim-uh-ler] / ˈsɪm ə lər /

adjective

  1. having a likeness or resemblance, especially in a general way.

    two similar houses.

    Synonyms:
    like
    Antonyms:
    different
  2. Geometry. (of figures) having the same shape; having corresponding sides proportional and corresponding angles equal.

    similar triangles.

  3. Mathematics. (of two square matrices) related by means of a similarity transformation.

[sim-uh-ler-lee] / ˈsɪm ə lər li /

adverb

  1. in a way that shows a general but not exact resemblance.

    The lab charges anywhere from $50 to $100 per blood test; other procedures are priced similarly.