Here's what rhymes with grammarical.
Words that almost rhyme with grammarical
lethal resole diesel weasel weevil gleeful teasel teazel medieval retrieval nonlethal primeval upheaval legal renal regal riyal people illegal needle feeble fetal penal beetle fecal siecle phenyl thiol venal beadle phial beagle seagull wheal wheedle decal respell adrenal genial needful sequel authorial feveral labial lacrimal steeple varietal enfeeble gonorrheal laypeople heedful nonlegal peaceful unequal pineal inositol notarial canticle coequal inveigle cathedral congenial duodenal deceitful requital bilabial paralegal centripetal estradiol octahedral uncongenial extralegal polyhedral tetrahedral