seam / seem are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
seam: (noun) joint consisting of a line formed by joining two pieces. (noun) a stratum of ore or coal thick enough to be mined with profit. (verb) put together with a seam.
seem: (verb) appear to exist. (verb) appear to one's own mind or opinion.
seam: s·IY·m
seem: s·IY·m
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)