1: μεμψίμοιρος
(Strong's #3202 — Adjective — mempsimoiros — mem-psim'-oy-ros )

denotes "one who complains," lit., "complaining of one's lot" (memphomai, "to blame," moira, "a fate, lot"); hence, "discontented, querulous, repining;" it is rendered "complainers" in Jude 1:16 .

2: μομφή
(Strong's #3437 — Noun Feminine — momphe — mom-fay' )

denotes "blame" (akin to memphomai, see No. 1), "an occasion of complaint," Colossians 3:13 (AV, "quarrel"). See QUARREL.

3: αἰτίαμα
(Strong's #157 — Noun Neuter — aitioma — ahee-tee'-am-ah )

"a charge," is translated "complaints" in Acts 25:7 , AV. See CHARGE.