We don't have synonyms for cyclecar yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are cyclical, cycler and cablecar.
(n) :
A small, lightweight, inexpensive car manufactured in the early twentieth century, characterised by the use of basic materials and sometimes fragile engineering.
(n) :
A small, lightweight, inexpensive car manufactured in the early twentieth century, characterised by the use of basic materials and sometimes fragile engineering.