1: πλείων
(Strong's #4119 — Adjective — pleion — pli'-own, pli'-on, pleh'-on )

the neuter of pleion, "more," is used adverbially and translated "most" (of degree) in Luke 7:42 (without the article); in Luke 7:43 (with the article, "the most"); 1—Corinthians 10:5 , RV, "most" (AV, "many"); Philippians 1:14 (ditto). See MORE.

2: πλεῖστος
(Strong's #4118 — Adjective — pleistos — plice'-tos )

the superlative degree of polus, is used (a) as an adjective in Matthew 11:20; 21:8 , RV, "(the) most part of" (AV, "a very great"); (b) in the neuter, with the article, adverbially, "at the most," 1—Corinthians 14:27; (c) as an elative (i.e., intensively) in Mark 4:1 (in the best mss.; some have polus), "a very great (multitude)."

3: μάλιστα
(Strong's #3122 — Adverb — malista — mal'-is-tah )

an adverb, the superlative of mala, "very," is translated "most of all" in Acts 20:38 . See ESPECIALLY. Note: For combinations in the translations of other words, see BELIEVE , C, Note (4), EXCELLENT , GLADLY , HIGH , STRAITEST.