ὥσπερ [13 verses](adv/prep) "As" is hosper, which means "the very man who," "the very thing, which," "the same as," "wherefore," and "although." -- The Greek word translated as "as" indicates a match with a person or thing, "the very thing, which," "the same as."

ὥστε [9 verses](adv/conj) "Wherefore" is hoste, which marks the power or virtue by which one does a thing, "as being," "inasmuch as," expresses the actual or intended result of the action in the principal clause: "as," "for," implying " on condition that," at the beginning of a sentence, to mark a strong conclusion, "and so," "therefore," and with subj. " in order that." Before an infinitive verb, the sense is "for" or "so as" to do something. -- "So that" is an adverb that marks the power or virtue by which one does a thing, "as being," "inasmuch as," expresses the actual or intended result of the action in the principal clause: "as," "for," implying " on condition that," at the beginning of a sentence, to mark a strong conclusion, "and so," "therefore," and with subj. " in order that."

ὅστις [90 verses](pron sg masc nom) "That" is hostis, which means "that," "anyone who," "anything which," "whosoever," "whichsoever" and "anybody whatsoever." -- "Which" is a pronoun that means "that," "anyone who," "anything which," "whosoever," "whichsoever" and "anybody whatsoever." Jesus often uses the root word as an adjective describing a high-status people as "somebodies."

ὅταν [70 verses](adv/conj) "When" is from hotan, which means "whenever (as a condition)," and "since (as a cause)." -- The Greek word translated as "when" introduces a phrase that explains a certain condition so "whenever" or "since." This is not the more common word for "when." Here, the condition is less certain to happen. 

ὅτε [19 verses](adv/conj) "Then" is hote, which means "when," "as when," "at the time when," and "sometimes." - "Then" is from an adverb/conjunction that means "when," "as when," "at the time when," and "sometimes."