We don't have synonyms for strimmers yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are trimmer, strimmer and trimmers.
(n) :
(British, horticulture) Synonym of string trimmer (“a powered, hand-held garden implement that uses a rotating monofilament line to cut grass, etc., without damaging other objects”).
(n) :
(British, horticulture) Synonym of string trimmer (“a powered, hand-held garden implement that uses a rotating monofilament line to cut grass, etc., without damaging other objects”).