Pentameter is a noun.

iambic pentameter

A pentameter is not a unit of distance - a pentameter is a verse of five alternating metrical feet - found in poetry.

Iambic pentameter couplets are often called Heroic couplets.

Unrimed Iambic Pentameter is called Blank Verse.

But I do not know of a generic alternate term for Iambic Pentameter.

No, coffee is not an iambic pentameter. Iambic pentameter is a metrical pattern in poetry consisting of lines with five pairs of alternating stressed and unstressed syllables. Coffee is a beverage and does not follow a metrical pattern like iambic pentameter.