Jeopardize for Imperil, or Endanger. The correct word is jeopard, but in any case there is no need for anything so farfetched and stilted.
Juncture. Juncture means a joining, a junction; its use to signify a time, however critical a time, is absurd. "At this juncture the woman screamed." In reading that account of it we scream too.
Just Exactly. Nothing is gained in strength nor precision by this kind of pleonasm. Omit just.
Juvenile for Child. This needless use of the adjective for the noun is probably supposed to be humorous, like "canine" for dog, "optic" for eye, "anatomy" for body, and the like. Happily the offense is not very common.
Kind of a for Kind of. "He was that kind of a man." Say that kind of man. Man here is generic, and a genus comprises many kinds. But there cannot be more than one kind of one thing. Kind of followed by an adjective, as, "kind of good," is almost too gross for censure.
Landed Estate for Property in Land. Dreadful!
Last and Past. "Last week." "The past week." Neither is accurate: a week cannot be the last if another is already begun; and all weeks except this one are past. Here two wrongs seem to make a right: we can say the week last past. But will we? I trow not.
Later on. On is redundant; say, later.
Laundry. Meaning a place where clothing is washed, this word cannot mean, also, clothing sent there to be washed.
Lay (to place) for Lie (to recline). "The ship lays on her side." A more common error is made in the past tense, as, "He laid down on the grass." The confusion comes of the identity of a present tense of the transitive verb to lay and the past tense of the intransitive verb to lie.