Primary
Part of speech: adjective
Definition: The first in a group or series. That which is placed ahead of others.
Part of speech: noun
Definition: A preliminary election to select a political candidate. The first year of grade school. A base or fundamental component; something that is irreducible. The most massive component of a gravitationally bound system. A primary school. Any flight feather attached to the manus (hand) of a bird. A primary colour.
Part of speech: verb
Definition: To take part in a primary election
Example sentence: The primary factor is proportions.
Particular
Part of speech: noun
Definition: A particular thing.
Part of speech: adjective
Definition: Pertaining only to a part of something; partial.Specific; discrete; concrete.Specialised; characteristic of a specific person or thing.Known only to an individual person or group; confidential.Distinguished in some way; special (often in negative constructions).Of a person, concerned with, or attentive to, details; minute; precise; fastidious.
Example sentence: You cannot hope to build a better world without improving the individuals. To that end, each of us must work for his own improvement and, at the same time, share a general responsibility for all humanity, our particular duty being to aid those to whom we think we can be most useful.