As an adverb ahead

is in or to the front; in advance; onward.

As an adjective previous is

prior; occurring before something else, either in time or order.

As a noun previous is

an existing criminal record; short for "previous convictions".

As nouns the difference between gap and seam

is that gap is an opening in anything made by breaking or parting while seam is a folded back and stitched piece of fabric; especially, the stitching that joins two or more pieces of fabric.Wp

As verbs the difference between gap and seam

is that gap is to notch, as a sword or knife while seam is to put together with a seam.

As adjectives the difference between sour and banana

is that sour is having an acidic, sharp or tangy taste while banana is curved like a banana, especially of a ball in flight.

As nouns the difference between sour and banana

is that sour is the sensation of a sour taste while banana is an elongated curved fruit, which grows in bunches, and has a sweet creamy flesh and a smooth yellow skin.

As a verb sour

is to make sour.

As an acronym BANANA is

Build Absolutely Nothing Anywhere Near Anyone (or) Anything. Someone who objects to the building of any structure in their neighborhood, especially in public policy debate. Used as an expression of irritation towards people who are thought of as being worse than NIMBYs.

As nouns the difference between landscape and pattern

is that landscape is a portion of land or territory which the eye can comprehend in a single view, including all the objects it contains while pattern is model, example.

As verbs the difference between landscape and pattern

is that landscape is create or maintain a landscape while pattern is to apply a pattern.

As verbs the difference between charging and recharging

is that charging is present participle of charge while recharging is .

As nouns the difference between charging and recharging

is that charging is (countable) an act or process of charging (as of a battery) while recharging is the act by which something is recharged.

As nouns the difference between factor and criterion

is that factor is a doer, maker; a person who does things for another person or organization while criterion is a standard or test by which individual things or people may be compared and judged.

As a verb factor

is to find all the factors of (a number or other mathematical object) (the objects that divide it evenly).

As adjectives the difference between insubordinate and nonsubordinate

is that insubordinate is rebellious or defiant to authority while nonsubordinate is not subordinate.

As a noun nonsubordinate is

one who is not subordinate.

Meaningful is a antonym of useful.

As adjectives the difference between useful and meaningful

is that useful is having a practical or beneficial use while meaningful is having meaning, significant.

As nouns the difference between tape and hose

is that tape is flexible material in a roll with a sticky surface on one or both sides; adhesive tape while hose is a flexible tube conveying water or other fluid.

As verbs the difference between tape and hose

is that tape is to bind with adhesive tape while hose is to water or spray with a hose.

As adverbs the difference between analogously and similarly

is that analogously is in an analogous manner; in a manner which evokes analogy while similarly is in a like style or manner.