Synonyms For "Cranks" :

1 syllable:

chalk, churl, glass, grouch, grump, ice, meth, nut, trash

2 syllables:

crackpot, cranky, crosspatch, fruitcake, nut case, screwball, shabu, starter, tender, tippy, zigzag

4 syllables:

deoxyephedrine

5 syllables:

methamphetamine