Oldfag is a synonym of oldbie.

As nouns the difference between oldfag and oldbie

is that oldfag is (internet|slang|offensive) an oldbie; a veteran member of the community (or any other online community) while oldbie is (internet|rare) an old-timer, a person with experience.

Oldbie is a antonym of newbie.

As nouns the difference between newbie and oldbie

is that newbie is a newcomer, someone new to something while oldbie is an old-timer, a person with experience.

As nouns the difference between catch and shellfisherman

is that catch is (countable) the act of seizing or capturing (jump) while shellfisherman is a person who attempts to catch shellfish.

As a verb catch

is (lb) to capture, overtake .

As nouns the difference between path and pathline

is that path is a trail for the use of, or worn by, pedestrians while pathline is the path taken by an individual fluid particle over a given time period.

As a verb path

is to make a path in, or on (something), or for (someone).

As nouns the difference between individual and pathline

is that individual is a person considered alone, rather than as belonging to a group of people while pathline is the path taken by an individual fluid particle over a given time period.

As an adjective individual

is relating to a single person or thing as opposed to more than one.

As nouns the difference between fluid and pathline

is that fluid is fluid while pathline is (physics) the path taken by an individual fluid particle over a given time period.

In physics terms the difference between particle and pathline

is that particle is any of various physical objects making up the constituent parts of an atom; an elementary particle or subatomic particle while pathline is the path taken by an individual fluid particle over a given time period.

As nouns the difference between particle and pathline

is that particle is a very small piece of matter, a fragment; especially, the smallest possible part of something while pathline is the path taken by an individual fluid particle over a given time period.

As nouns the difference between time and pathline

is that time is while pathline is (physics) the path taken by an individual fluid particle over a given time period.

As nouns the difference between period and pathline

is that period is (obsolete|medicine) the length of time for a disease to run its course while pathline is (physics) the path taken by an individual fluid particle over a given time period.

As an adjective period

is appropriate for a given historical era.

As an interjection period

is (chiefly|north america) and nothing else; and nothing less; used for emphasis.

As a verb period

is (obsolete|intransitive) to come to a period; to conclude.

As an adjective pelvic

is of, pertaining to, or in the region of, the pelvis; as, pelvic cellulitis.

As a noun jillstrap is

a pelvic protector, a woman's equivalent of a man's jockstrap.