As nouns the difference between terms and spacky
is that terms is while spacky is (uk|slang) a clumsy, foolish, or mentally deficient person.
As an adjective spacky is
(uk|slang) clumsy or foolish; mentally or physically inept.
terms
English
Noun
(head)
Statistics
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spacky
English
Adjective
(er)
(UK, slang) clumsy or foolish; mentally or physically inept
Noun
(spackies)
(UK, slang) A clumsy, foolish, or mentally deficient person.