thesis (greek root word)
put, place, position
thesis
a position taken in an argument supported by a set of reasons
theme
an essay or composition on a certain subject with a statement and supporting reasons
parenthesis
(para - beside) - a statement beside (or inside) a main sentence
synthetic
(syn - together) - elements put together to make a material like a natural one (synthetic rubber)
synthesizer
(syn - together) - instrument which puts sounds together like real musical instruments
antithesis
(anti - against) - a position or point of view about a subject against the position under consideration