| backslide | (verb) drop to a lower level, as in one's morals or standards | Synonyms: lapse |
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| collide | (verb) crash together with violent impact | Synonyms: clash |
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| (verb) cause to collide | - |
| (verb) be incompatible; be or come into conflict | Synonyms: clash, jar |
| consolidate | (verb) unite into one | - |
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| (verb) bring together into a single whole or system | - |
| (verb) make firm or secure; strengthen | - |
| (verb) make or form into a solid or hardened mass | - |
| (verb) form into a solid mass or whole | - |
| elide | (verb) leave or strike out | - |
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| glide | (verb) move smoothly and effortlessly | - |
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| (verb) fly in or as if in a glider plane | - |
| (verb) cause to move or pass silently, smoothly, or imperceptibly | - |
| holiday | (verb) spend or take a vacation | Synonyms: vacation |
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| invalid | (verb) injure permanently | Synonyms: disable, handicap, incapacitate |
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| (verb) force to retire, remove from active duty, as of firemen | - |
| invalidate | (verb) take away the legal force of or render ineffective | Synonyms: vitiate, void |
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| (verb) show to be invalid | Synonyms: nullify |
| (verb) make invalid for use | Synonyms: cancel |
| (verb) declare invalid | Synonyms: annul, avoid, nullify, quash, void |
| slide | (verb) to pass or move unobtrusively or smoothly | Synonyms: slither |
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| (verb) move obliquely or sideways, usually in an uncontrolled manner | Synonyms: skid, slew, slip, slue |
| (verb) move smoothly along a surface | - |
| solidify | (verb) become solid | - |
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| (verb) make solid or more solid; cause to solidify | - |
| validate | (verb) make valid or confirm the validity of | - |
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| (verb) prove valid; show or confirm the validity of something | - |
| (verb) give evidence for | Synonyms: corroborate |
| (verb) declare or make legally valid | Synonyms: formalise, formalize |