Is seemed a homonym

Answer 1

Yes "seemed" - past tense of seem: "to appear to be"

sounds the same as "seamed" which means having seams - joins between pieces of fabric.

so seemed is a homonym of seamed

Answer 2

"Is" and "seemed" are not homonyms. Homonyms are words that are pronounced the same but have different meanings. "Is" is a form of the verb "to be," while "seemed" is the past tense of "seem."