Compounds of

• ぽか
  (n,vs) (col) blunder
  (careless) mistake
  error
• ぽっ
  (adv-to) (on-mim) with a blush
  slightly flushed
  fresh-faced
• ぽん
  (adv) (on-mim) pop
  plop
  cloop
• まあ
  (adv,conj,int) (fem) you might say
  Oh!
  Wow!
  Well!
  (P)
• まい
  (aux) (1) probably isn't (doesn't, won't, etc.)
  (2) don't (doesn't) intend to
  intend not to
  (3) must not
  (when used in an imperative sentence) don't
• まし
  (aux) (1) (pol) (used to make a polite request or demand) please
  (2) used to increase the politeness of a greeting, apology, etc.
• まじ
  (adj-na,n) (1) (sl) serious (not capricious or flirtatious)
  (aux-v) (2) cannot
  should not
  will not
  must not
• ます
  (aux-v) (1) (pol) used to indicate respect for the listener (or reader)
  (2) (arch) (hum) used to indicate respect for those affected by the action
• ませ
  (aux) (1) (pol) (used to make a polite request or demand) please
  (2) used to increase the politeness of a greeting, apology, etc.
• むず
  (aux-v) (1) (arch) will probably be
  (2) intending to
  will
  (3) should
• めく
  (suf,v5k) (1) to show signs of ...
  to have the appearance of ...
  (2) (X) (col) to jerk off
  to masturbate
  (P)
• めじ
  (n) young tuna (esp. northern bluefin tuna under 1 meter)
• めっ
  (int) used to scold small children and pets
• め組
  (n) (arch) fire brigade (in Edo)
• もう
  (adv,int) (1) already
  anymore
  (2) soon
  shortly
  (3) more
  further
  other
  again
  (int,adv) (4) interjection used to strengthen expression of an emotion (often exasperation)
  (P)
• もぐ
  (v5g) to pluck (usually from a tree)
  to pick (e.g. apples)
  (P)
• もつ
  (n) (food) (abbr) entrails
  giblets
  guts
  internal organs (as food)
• やあ
  (int) (1) Yo! (greeting)
  (2) Wow! (expression of surprise)
• やか
  (suf,adj-na) (after a noun, adjective stem, onomatopoeic-mimetic word, etc.) seeming very ...
• やご
  (n) dragonfly naiad (nymph)
• やら
  (prt) particle denoting uncertainty or a listing (words, clauses)
• やれ
  (int) oh!
  ah!
  oh dear!
  dear me!
  thank God!
• より
  (adv,prt) (1) from
  out of
  since
  at
  (2) than
  (3) other than
  except
  but
  (4) more
  (P)
• らか
  (suf,adj-na) (after an adjective stem, onomatopoeic-mimetic word, etc.) being ...
• ろは
  (n) (col) free
• ろ液
  (n) filtrate
• ろ過
  (n,vs) filtration
  filtering
  percolation
• ろ紙
  (n) filter paper
• ろ水
  (n) (1) filtered water
  (2) drainage
• わあ
  (int) (1) wow! (surprise)
  (2) yeah!
  alright! (joy)
  (3) waah! (crying)